Linux

RHEL ultimately comes from Fedora (plus Redhat has a great say in where Fedora is headed), so... RHEL won't become sort of an AIX or HPUX anytime soon.

That said, Redhat's move opens up the position of "enterprise-like distro for scientific/technical shops and other people who do their own support" (think, from CERN to small software houses) that so was the reign of RHEL clones (together with Ubuntu, of course).

Those are people who will probably never buy RHEL licenses for all their machines no matter what, so in a sense it stands to reason that RH doesn't care about them (if you think their move is about money rather than falling for the "value to the community" PR spin), but those same people are also trend setters whose choices, in time, trickle down to universities and then companies, and to me it looks like there's a huge opportunity there (and that Alma is currently in the best position to harvest from it in the long run).