system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Steve Rogers in Age of Ultron vs Endgame: what changed?

At the end of AoU, Steve tells Tony that he is "home", which suggests that he is finally ready to leave the past behind.

Yet, at the end of Endgame, he goes back to the past? What changed -- wasn't he content in staying in the future?
gpt
I would imagine it was the combination of

>![Seeing Peggy again when he and Tony went back in time, and an actual opportunity to see her again when he took the stones back] 

Its easy to accept your fate with no other options, but when you have a real chance, things change.