Dynamic swap and zswap aren’t really the same as efficient ram usage it’s just good ways to mitigate when you run out. But when your using actual swap it’s in my experience more noticable on OSX than Linux, which at least for me remains responsive until you’re using a lot of swap.

Linux can share libraries too but users can run into situations where their applications use multiple different versions of Qt, GTK, etc. at the same time

Maybe Arch & Flatpak users hit this, but avoiding multiple versions of the same library is what distros exist for and avoiding loading different frameworks is what Desktop Environments are for. Although the ability to restore apps after closing them is pretty sweet and built in to OSX in a way that lets me safely kill apps to reduce the memory I’m using.

I think the main reason my Linux setup consumes less memory is probably because I used Kate for most file editing instead of vscode, which is probably an unfair advantage to Linux.