I use Rocky for about 18 months, no problems with compatibility on DA. I think both Rocky and Alma are great choices coming from CentOS (like I did). Pretty sure there are scripts to switch if a business model goes sour.
Not to my experience. If you're on the forum as long as I, you see that there were various issues that were Debian only/specific, and were not occuring on RH alike systems. I haven't seen the other way around, or rarely.and it is the only OS with fewer issues for servers