it depends on dynamic vs static libraries
why must the user think about this shit? i can grab a windows app made for XP and run it on 11, and it'll run perfectly fine, and i don't have to think about the way its dynamic loader figures it out
ill have lower chances of running an app made for RHEL8 on RHEL9 than that
FFXIV is very nice in-game, probably the most welcoming and laid-back MMO community
don't go on youtube or its main subreddit or ffxivdiscussion tho lol, they can be pretty vile