What’s the difference between git switch and git checkout

Well, according to the documentation you link to, its sole purpose is to split and clarify the two different uses of git checkout:

• git switch can now be used to change branches, as git checkout <branchname> does
• git restore can be used to reset files to certain revisions, as git checkout -- <path_to_file> does

People are confused by these different ways to use git checkout, as you can see from the many questions regarding git checkout here on Stackoverflow. Git developers seem to have taken this into account.