I also use the win10 openssh. Sometimes it is not so great at terminal emulation in a way that a Unix environment will expect. For example I get frequent weird behaviors running vi. Maybe could be fixed with TERM or termcap but putty "just works".

Also I haven't seemed to be able to get ssh-agent working there. Maybe just need to look into it more.

On the agent thing: I don't know about the OpenSSH agent, but I have KeeAgent set up and it works without a hitch in MSYS (and thus Git Bash) as well as with the SSH port of Microsoft.

I set it up. As a service. Check stackoverflow.

the Windows Terminal is.. while significantly better than ever - its still not great, the lack of bell support, and you effectively need to run whatever you're doing inside screen to make curses applications run correctly.

I use openssh from powershell. You can install it as a package or feature I believe.

But WSL also supports lots of other useful things!