Thank you, and that's a good advice from the comment:

"So if you're writing a script that needs to work with dozens of past and future Git versions, use git checkout. If you need to teach humans how to talk to Git, use git switch. Some details of some flags may change in the future, but I'd argue that that'll be a smaller mental challenge than trying to teach which parts of git checkout do what."

I'll try to use more switch/restore

I've actually used "git stash" more than it should be (I'm probably applying real bad "p4/g4/svn" like ideas in my head to the development. As soon as I go into project with few more people, and I'm lost, though I was able to make few PR's in github for things - but everytime had to le-learn the process).