The lack of recognition could have come from an old man simply not remembering the passing droids of his youth. Lastly, Owen didn't seem the sentimental type to form any emotional attachments to droids. Being a practical man, he viewed them as tools to be used and replaced when they no longer functioned.
So Owen had no idea his "new" protocol droid's name was C-3PO. A counter to that might be asking why Owen didn't recognize C-3PO's distinct voice, but again, it's worth remembering Owen hadn't seen C-3PO in more than 20 years. It's possible Owen simply forgot what C-3PO's voice sounded like.
The real reason why Obi-Wan Kenobi, the Lars family, or Darth Vader didn't act in the original Star Wars trilogy as though they knew C-3PO or R2-D2 previously is that the prequel trilogy, in which they first meet the two droids, had not been written yet.
The astromech droid (R5-D4 and later R2-D2) was likely intended to interface with and repair the moisture vaporators and other farm equipment. Threepio was specifically purchased to talk to the vaporators (and to speak a language called Bocce, if that's a separate thing).
Why Darth Vader Was TERRIFIED After He Killed Obi-Wan On the Death Star... - Star Wars Explained
Why did Luke buy R2-D2?
While he was almost bought, R5 had a bad motivator, which prompted Luke to buy R2-D2 instead, the much more famous astromech who carried the Death Star plans and a message requesting Obi-Wan Kenobi's help from Princess Leia.
secondly, in Legends, R2 was given programming that actually restricted him. from sharing any information with Luke or Leia. about their parents or relation to one another. this was all part of the plan. to conceal this information from the twins.
R2-D2 was present when Padmé gave birth to Leia and Luke, so he knew Luke was Anakin's son – but what he didn't know was that Anakin became Darth Vader. In addition to that, Anakin's fall was surely a painful event in R2-D2's life, one that he definitely wouldn't like to remember or even talk about.
in the Dark Horse comic series star Wars Tales, which is now part of legends, it's revealed that Darth Vader did recognize C. 3PO on Cloud City. when 3PO was shot by Stormtroopers, his parts were brought before Vader. because the Imperials thought he could hold valuable.
Since Bail Organa had C-3PO's memory wiped previously in order to prevent him from spilling the secret of Leia's parentage, it could be that this was a semi-regular occurrence for the droid given he couldn't be trusted to keep quiet about things.
Threepio was also there when Luke and Leia Amidala Skywalker were born. They were later left under the care of a Captain Antilles. In order to protect Luke and Leia from their father, Darth Vader, Bail had C-3PO's memory erased, causing Threepio to forget everything from his past life.
Obi-Wan Kenobi has no idea who C-3PO is when they meet in “Star Wars: A New Hope” even though the prequel trilogy later told us that the two certainly knew each other.
Why is C-3PO forbidden to translate the Sith-Runic language? Rather simple. All protocol droids have the ability to translate. But a Senate ruling put in a rule that required all translating droids to be forbidden to translate, and if such system is overridden, to erase the droid's memory.
She senses Anakin when she reaches out to the pilot — and Vader realizes that Ahsoka, his former Padawan, lives on. In Season 2, Episode 18, “Shroud of Darkness,” Ahsoka's guilt manifests as a vision of Anakin, who's angry with her for leaving him all those years ago.
You saw how Luke's attitude completely changed when he realised that was actually Yoda and so did Yoda's behaviour. As for the r2 thing, is incredibly likely he just suspected R2 had had his memory wiped several times since they last saw each other.
Although Lucas portrayed R2-D2 as a defiant droid who refused to listen to his master's orders, the theory video claims R2-D2 wouldn't stay with the ship because the last time he did that, Anakin never came back.
C-3P0 didn't; his memory was wiped at the end of Revenge of the Sith to prevent him from spilling the beans. Why was Anakin always more attached to R2D2 even though he literally built C-3PO? R2-D2 was almost constantly around Anakin Skywalker during the Clone Wars, serving as his personal astromech.
What happened to R2-D2 after Anakin became Darth Vader?
After Skywalker turned to the dark side of the Force, the droid served Senator Bail Organa for a time in the Imperial Senate. Nineteen years following the purge of the Galactic Republic, R2-D2 played a pivotal role in helping the Rebel Alliance destroy the Empire's Death Star superweapon.
In Star Wars: The Force Awakens, set approximately 30 years after Return of the Jedi, R2-D2 is revealed to be kept in storage at the Resistance base on the planet D'Qar, having put himself in a low-power mode after Luke Skywalker's disappearance.
Many of Jabba the Hutt's thugs were killed by Skywalker. Skywalker hid his lightsaber inside R2-D2's dome for the mission to rescue Captain Solo from Jabba the Hutt's palace.
On a mission to Pasaana, C-3PO discovered safeguards in his programming made it impossible for him to translate Sith runes that could help the Resistance locate the legendary planet Exegol. With the fate of the galaxy hanging in the balance, C-3PO reluctantly agreed to have his memory erased so the runes could be read.
The Invasion of Naboo. R2-D2 repairs the shield generator of Queen Amidala's Royal Starship. In 32 BBY, R2-D2 was in the possession of the Royal Engineers of Naboo, and was assigned aboard Queen Amidala's Royal Starship as a maintenance droid.
Towards the end of the war, Anakin turned to the dark side and Padme died so her friend, Bail Organa took the droid as well as R2 when he took her daughter, Leia. C-3PO has his memory wiped unlike R2-D2. He served Captain Antilles on many missions for the secret rebellion.
After C-3PO and R2-D2 landed on Tatooine, Jawas picked up the two droids, fitting them with restraining bolts. The Jawas sold the robots to Owen and Beru Lars and their nephew Luke Skywalker, a seemingly minor event that would change the fate of trillions in the galaxy.
In this version of events, R2's deux ex backup goes deeper into C-3PO's storage banks and reawakens his entire memory from the initial switch-on by a young Anakin in The Phantom Menace.
