Just to be super nerdy, here’s an amazingly well-written article on the subject from someone with a lot of credibility: https://chrisdown.name/2026/03/24/zswap-vs-zram-when-to-use-what.html

tldr; prefer zswap

It must be something that can’t possibly be construed as sexual innuendo, like Linux Image Manipulation Program (LIMP)…

Testing really is for testing. If you like to tinker and don’t mind the occasional breakage, testing can be great to help the project by trying out newer software and reporting bugs. Otherwise, stable with backports and/or flatpaks if you need newer packages will be a lot more relaxing.