there's a non-exhaustive list of applications on the archwiki [0] that put their config/data in dotfiles in the home directory. surprisingly, there's also lots of pushback from maintainers of projects who don't want to change this, for whatever excuse they can produce. a Reddit thread has some list of issues where the change is brought up [1].
Anyway, I'll look forward to testing this out.
[0] https://wiki.archlinux.org/title/XDG_Base_Directory
[1] https://www.reddit.com/r/linux/comments/971m0z/im_tired_of_f...