#Steve's aging in Endgame is our best estimate for Bucky's in universe aging

[logansgaar]

In light of the fact that Bucky (Loki and Thor too for that matter, since the Chrises, Tom and Seb have all aged past their characters) should pretty much still look like he did in CATFA in-universe, it's hilarious to imagine Sam slipping up one day and calling Bucky "kid" without thinking and it's mortifying for them both. Sam has a whole list of old man jokes from his time with Steve that he now gets to reuse on Bucky, except goddamnit Bucky pretty much rebuilt his personality after a factory reset from breaking conditioning so the illusion of being old breaks down easier than it did with Steve, his sense of humor is eerily close to genz/clearly influenced by Princess Shuri, and sometimes when Sam is distracted by something else, he does let "kid" drop like he does with Joaquín.

Bucky looks disturbed because Steve probably keeps accidentally calling him "son" and "kid" during their meet ups too, since there's a strong chance he has grandkids that look Bucky's age, and now Sam's doing it as well, he's in his 100s what the hell is going on? Meanwhile this is, based on a calculated estimate on the serums aging rate, what he looks like in-universe: