Thanks for the suggestions!

I'm not exactly a low end enthusiast, like doing it for fun, but I find myself around low end devices daily, from lack of alternatives, so I've been experimenting with software, trying to make the experience a bit better. To give a bit more of context, here's what I use:

I have a somewhat decent main computer (although it has some hardware issue that makes it unstable, but it's another topic), that I use with fedora and gnome, but I have a small 2 in 1 laptop that I use for writing and light web usage, shared with my gf. It has 2gb of ram and an atom z something cpu. It's currently running mx linux with 32-bit firefox, and runs better than one would expect, but still a bit slow. My mom has a mini pc with 4gb of ram and a celeron n30 something. It's running debian with xfce. The ram is fine, but I find it really slow. My sister has a laptop with the same ram and a very similar cpu, same situation, but it's currently running fedora with lxde (it had fedora with gnome before and was very very slow, so I suggested a change, but my sister insisted on keeping fedora, because she liked it. Surprisingly, the lxde version is much lighter than I expected). The worst machine is from my gf's brother. He enrolled in an online course and needed a pc for the classes, so he took one they had sitting in a corner. It has a pentium cpu (don't remember the model), 2gb of ram and came with windows 7, so I replaced with mx linux and it's running worse than before.