Pop OS is similar to Ubuntu and doesn't use snap.
It depends on what is meant by "family computer" but don't underestimate the usefulness of a cheap chromebook as well. My wife uses hers exclusively, since using the internet is pretty much the only thing she actually uses a computer for.
In what way? For any desktop usage Ubuntu is suitable for, Pop_OS can do it.
Myself I used to buy these little Atoms with eMMC running Windows S. E.g. HP used to have good hardware in that class. Now Windows S has been discontinued and I don't see much choice in the class anymore. Maybe Acer sometimes, but I have zero experience with them.
For Chromebooks there is GalliumOS, but it looks very silent. Not sure whether it is still alive. Last supported model is from 2019.