You mean not aligning with Red Hat and what they're pushing on everyone else. Ubuntu is on a shorter release cycle compared to Debian so they're usually the first non-Red Hat distro with new stuff. Systemd vs Upstart, Unity vs GNOME (3?), etc.
They try to do new stuff, and there's nothing wrong with that. Not everyone should blindly follow RH's lead. Systemd was objectively shit at the beginning, run by a person who was actively hostile to any feedback he didn't like. There were multiple highly critical bugs whose patches weren't backported ('just update' as if it's that easy with the sprawling beast that is systemd).
> not properly testing packages
What do you mean? I only recall one popular instance of an issue with Ubuntu packages, and it's when they released a major upgrade to Samba because backporting a critical security fix to the previous major version, the one that came with the distro originally, was too hard (in their words), which ended up breaking Samba for a bunch of people.
Ubuntu isn't "flakey". It makes a different tradeoff compared to RHEL - slightly newer version of stuff for slightly less stability. For many orgs that's preferable to obsolete 10 year old versions of most software for amazing stability.
Talk about hyperboles. RHEL 8 is from 2018 and has had considerably more updates than Ubuntu 18.04. In fact some packages might even be newer than what is in 20.04.
Modules are much nicer to use than the previous software collection system because they actually replace the "original" package, so it's just a straight version upgrade without having to worry about fixing configuration files etc. if it's compatible.
There's a lot of flexibility in this to support both those that need newer versions of things as well as older stable versions, just be aware and choose and plan accordingly.
1: https://access.redhat.com/support/policy/updates/rhel-app-st...
Normally you could also grab the releases from the source directly and let the upstream source figure out compatibility for you. However, it seems like the folks over at Podman have discontinued their external repository, so I guess they don't care about bringing new versions to Ubuntu either.