I made one alt for easier subbing/ helping out during raid lockout and ended up playing it a lot more and it's now my main. And my former main will be my raid alt. Keeping two characters decently geared, especially on different roles, is a hassle and I'll see how seriously I'll do it next tier but it's nice to have the option.

I have one or two old chars on Shiva where I played before transferring to Zodiark, one of them was for playing with a friend that wanted to play the story with me but they ended up quitting post 2.0 so I don't really use it anymore. I only used it once to help a friend get a house by throwing my name in in their name and that's it. The game doesn't feel alt-friendly enough for me to actively play them, I've been a notorious altoholic in other games but being unable to transfer things between characters without having my own FC was a bit of a dealbreaker for me.