If you don't want Canonical's packages, you should probably just be using Debian rather than Ubuntu. It's not 2008 anymore, stock Debian is quite user-friendly.
I'm used to running experimental software but I wasn't ready for my computer to not boot one day because of uutils. The `-Z` flag for `cp` wasn't implemented in the 9 month old version shipped in Debian at that time so initramfs creation failed...
[0] https://lists.debian.org/debian-devel/2026/04/msg00004.html
See: https://lists.debian.org/deity/2025/10/msg00071.html - Hard Rust requirements from May onward - by a Core Ubuntu Developer
I feel like Fedora has the same pragmatic approach (allows non-free drivers, packages, etc.) and is just as easy to use.
Some FOSS software seems to maximize kernel IO last time I had a Gentoo.