You run into the same problem on other platforms too of course (eg Android)
Ubuntu has never ever been the most stable or useful distro. What it did have was apt and more up to date stuff than debian.
I would never willingly choose Ubuntu if allowed other options (Fedora, Debian, maybe CoreOS, etc)
But I mostly agree with you. Once you get out of that phase, I don't really see much value in Ubuntu. I'd pick pretty much anything else for everything I do these days. Debian/Fedora/Alpine on the server. Arch on the desktop.