I'd be seriously considering Debian or, hear me out, NixOS. We run all our work servers on Ubuntu, but ~6 months ago I switched my workstation to NixOS and I couldn't be happier. I've been following "latest" or whatever they call it, being able to treat the OS package versions like the rest of our software (update the flake.lock file and then burn it in in dev+stg for ~2 weeks before rolling to prod) is pretty attractive.
to be fair their storage, and I mean their SANs, is still the best (excluding very expensive alternatives that are only really beating IBM in few limited scenarios).
I still like DB2, but only for banking/finance core stuff, and their mainframes are just unique machines, I'm very fond of them.
IMNSHO this makes them unfit for purpose. I think this is the nail in the coffin for Ubuntu for me.