Well, could've been clearer, my experiences apply to snaps and flatpaks. Huger and slower. And I imagine that on older machines, with fewer cores, slower drives or less ram, possibly unuseable. (Don't know.)

I do know that I'm seeing a lot less 'Electron' - framework apps (FAT and cycles-sucking) being released these days, doesn't seem too popular.

Appimages are easier to install but have only tried a couple. 'Stellarium.appImage' is MUCH slower to load, but OK in operation.

I'd enjoy hearing the -measured numbers- and how many people prefer prefer these FAT formats and why.