For me personally, it’s because it’s been so aggressively shoved in my face in every context. I never asked for it, and I can’t escape it. It actively gets in my way at work (github copilot) and has already re-enabled itself at least once. I’d be much happier to just let it exist if it would do the same for me.

I’m really interested in trying pixelfed, but the 15 character username limit is really restrictive. I don’t want to sign up with a name that doesn’t match the handle I already use on instagram and other related places. They have a github issue for it, but it there’s no indication of when it might actually be changed.