system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] R2D2: Why doesn't he fly from ANH onward (would have been useful in RotJ instead of falling head-first into the sand), and why doesn't he remember Yoda in ESB?
gpt
The blaster shot from Vader's TIE fighter fried most of his relevant memories and third party software. The post battle of Yavin R2 was basically the old droid's personality grafted onto a new brain.