edit:
I’ve updated & expanded the list (finished for today)

Maybe look into something like impermanence and having root on tmpfs. It’s what made NixOS really “click” for me.
This looks quite interesting but I honestly can’t think of any use case where I would find this useful for me. Also this seems like something best to try in VM first. I’ll keep this one in a bookmark though, may become useful later. Thanks!
impermanence forces you to be intentional with your system, where files are persisted, which is great for: hygiene like feeling like the computer was freshly formatted on each boot; using NixOS as intended by keeping things declarative (in other words, “nixmaxxing”); security also, to a lesser extent tbh, but it’d be protecting against malware nesting at impermanent paths

