Ubuntu in general has been disappointing I still use it for servers though I’m considering moving to something based on RHEL.
Not a great timing to move to something RHEL-based!
If I may ask, why not Debian? You’re already familiar with 99% of the distribution, as it’s the base for Ubuntu.
My main issue with Debian is LTS support, I usually run like Ubtunu LTS and I don’t upgrade until it isn’t supported. The stability of LTS is great.