I use layered security (in the sense of servers) with a password lifetime of 10 days. I deal with servers daily and the issue of compromise has been twice in on firewall containers/servers which was fine as the systems in place found it, found the issue with the net facing software and I fixed it. Practicality doesn't mean no security.

If you're using SSH, you should be using keys, and not passwords.

Those aren't mutally exclusive

Can you require keys AND passwords? I haven't been able to figure out how to get that to function - if passwords are allowed, it lets you in with or without a key, from what I can tell. I'd be happy to be wrong though!