Yeah, package manager is a big one. Many of us got burned by rpm’s early on and just avoided all rpm-based distros since then.
Of course as you say that hasn’t been a problem for over 10 years but the scars haven’t gone away.
I’d only recommend Ubuntu to someone if I knew they knew some else using Ubuntu (so I could tell them to hassle that person instead of me when they have problems).
Otherwise, I’d absolutely recommend Fedora, because it’s actually up to date unlike Debian. I use it myself because it tends to have the best of what the open source community has to offer while not needing constant tweaking