Running Ubuntu on two machines, also using FreeCAD. Not great not terrible. Snaps from canonical are a pain (prepare to have first run loading times 5+sec and cluttered ram afterwards) you can get rid of them but at that point it's probably better to just go with Debian if you're not after bleeding edge stuff.
Discussion
I'm definitely not after bleeding edge, and load times are annoying, but . . . I grew up waiting for floppies to load, so pretty much anything from the last 20 years is fast enough for me. LOL!