>>280702058Stein's;Gate aged poorly, but not for the reason you described. The real issue with Stein's;Gate is that it, conceptually, was a nostalgic send-up of the old Akihabara that was already rapidly dying back in 2009.
Of course, today, nearly 20 years later, that very aspect is completely incomprehensible, because Akihabara has been purged multiple times, lost all of it's soul and toxins and now ended up as a characterless "anime land", when Akiba never really was about anime in the first place.