For jujutsu, it's fine on your own computer, but you probably have to use git in the CI or on remote servers. And you probably started with git, so moving to jujutsu was an added effort (similar to dvorak).
I don't get the mechanical keyboard one, though. I am fine with any keyboard, I just like my mechanical keyboard at home. Just like I am fine with any chair, but ideally I would have a chair I like at home.
120fps I have no experience with, but I would imagine it's closer to video quality. Once you're used to watching everything in 4K, probably it feels frustrating to watch a 1080p video. But when 4K did not exist, it was not a need. I actively try to not get used to 4K because I don't want to "create the need" for it :-).