For me, I don't think I could survive without git stash, I use it daily for various reasons (e.g. for validating a small bug fix, git stash & git stash pop lets me attempt to reproduce the issue both with and without a correction). The one downside with the CLI stash command is that it's very easy to forget things in stash though, but I don't think GUIs generally support stashing?

Another one I find myself doing quite often is git checkout BRANCH -- PATH, to pull specific versions of files between branches.