2019, so 4-5 years ago so not that recent but not ancient either. But unfortunately tutorials have not been updated.

I would say that the biggest benefit of git switch is that you can't switch to a detached state without using a flag (--detached or -d). If you do git co $tag or git co $sha-1 you may get at one point the error “you are in a detached state” which is ununderstable for begginers. To get the same error with git switch you must explicitely use git switch --detached $tag/$sha-1 which makes it much easier to understand and remember that you are going to do something unusual.

More generally it's harder to misuse git switch/git restore. And it's easier to explain them since the only do one thing (unlike git checkout which is a mess !).

So if it's only for you git checkout is fine, but I would still advice to use git switch and git restore so you will have an easier time to teach/help begginers.