I held off trying it for a few months, as I expected some gremlins with new major release. Main problem is that there is no Motif runtime library in official repositories. It is available in a few "community" repos, so one has to install it from there. Then there is still no libXm.so, so one has to create a symbolic link from libXm.so.4.0.4. Strangely, motif-devel is still in official repositories.
Other notes: install java-21--openjdk-devel and openmpi.