- The guide was mostly written before that was possible
- Many servers are slow to update to newer distro versions with newer openSSH versions. I still need to access at least one server which can’t support it yet. (And just one which doesn’t support it forces me to use the GPG approach so that it’s the same key everywhere.)
- the guide also tells you to use the new approach if it’s available to you :)
- GPG is still used for some other things, like signing git commits
I didn't mean my comment as criticism of the guide, just to say that the method it uses is very complicated, and that there's a simpler one. If you can't use the simpler one, this is a great guide!
- The guide was mostly written before that was possible
- Many servers are slow to update to newer distro versions with newer openSSH versions. I still need to access at least one server which can’t support it yet. (And just one which doesn’t support it forces me to use the GPG approach so that it’s the same key everywhere.)
- the guide also tells you to use the new approach if it’s available to you :)
- GPG is still used for some other things, like signing git commits