I avoid Ubuntu because Canonical has a history of going their own way alone rather than collaborating on universal standards. For instance, when the X devs decided the successor to X11 needed to be a complete redesign from scratch companies like RedHat, Collabora, Intel, Google, Samsung, and more collaborated to build Wayland. However, Canonical announced Mir, and they went their own way alone.
When Gnome3 came out it was very controversial and this spawned alternatives such as Cinnamin, MATE, and Ubuntu’s Unity desktop. Unity was the only Linux desktop, before or since, to include sponsored bloatware apps installed by default, and it also sold user search history to advertisers.
Then, there’s snap. While Flatpak matured and becoame the defacto standard distro-agnostic package system, Canonical once again went their own way alone by creating snap.
I’m not an expert on Ubuntu or the Linux community, I’ve just been around long enough to see Canonical stir up controversy over and over by going left when everyone else goes right, failing after a few years, and wasting thousands of worker hours in the process.
I highly recommend Framework laptops for Linux. I have not used the Framework 16, but I can attest that Linux support for the Framework 13 (intel 11th & 12th gen) is excellent. I have used Fedora on the Intel 11th gen and Intel 12th gen, everything worked immediately on a fresh install without any workarounds or issues. Other distros might require a few package installs, but Fedora, Ubuntu, and Ubuntu derivatives should work out-of-the-box without any additional configuration. The Arch Wiki article for the Framework covers pretty much everything you might need to know to have an optimized Linux experience with any distro.
Aside from Framework’s excellent Linux support, I really have to stress how cool and unique it is as a laptop for developers and tinkerers. This thing is literally designed to be opened up, repaired, and modded. All of the internal components are clearly labeled and easily accessible, there’s even a little spot inside the laptop chassis just for spare screws in case a screw ever gets lost! Another awesome obscure feature of this laptop is the ability to use a Storage Expansion Card for dual booting. I just plug in the expansion card to boot into Windows, then unplug it and I’m back in Linux. It is absolute bliss compared to Windows and Linux sharing a bootloader.
I know I’m rambling, but I really could keep going on and on about Frameworks. They truly are unlike any other laptop, in all the right ways.