Just buy a new SSD to install Linux on. If you decide to switch back just plug the old one in.

I quite enjoy Nix flakes for this. Only certain languages have good support though (C, Rust, Haskell, OCaml, …).

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Well, most people installing Arch for the first time have no idea what a typical Linux install does under the hood. That makes it a worthwhile learning experience. The same commands you use during the setup you can later use to fix or change things. It basically forces you to become a somewhat proficient Linux user.