If I had a compact Linux laptop for work rather than a MacBook I'd be raw dogging NixOS already rather than using nix-darwin. There isn't really much about MacOS that sets itself apart these days.

The only other thing keeping me hooked in is that I use an iPhone and have an iPad and need a bit more time for that to feel like a sunk cost before I pull the plug on it all.

Same with Windows on my gaming PC but I haven't looked into whether I'd encounter any friction with Nix there.

All that would remain after that is getting off of iCloud for storage and email.