I have a Pi 4 (8 GB) with Ubuntu MATE and the main flaw I've run into is that a lot of programs don't scale down to the little 1024x600 LCD I hoped to use with

I have a Pi 4 (8 GB) with Ubuntu MATE and the main flaw I've run into is that a lot of programs don't scale down to the little 1024x600 LCD I hoped to use with it. Of course, that will be a problem with any distro on such a small screen. On a regular monitor it's just a bit sluggish, but no worse and perhaps a little faster than the official OS. Plenty usable as a low-end desktop. I don't think it has even come close to exhausting 8 GB (looks like the 400 only has a 4 GB version?). I just wanted some head room there.