Do you user finger or other "old" protocols?

I'm not sure what qualifies as "old" -- I would use finger if anyone still launched xinetd by default. I use sftp a bit. That's probably better supported than ftp, but has essentially the same user experience. I use IRC as well as discord and, of course, I use SMTP and IMAP quite a bit. I set up a Gopher server about a decade ago and it looks like I forgot about it and it hasn't been active for the last 5 years. I think three people visited it over 5 years.

Oh. I'm trying to setup a Genera server, and it requires NFSv2, so I think that counts as an "old" protocol. And honestly, Microsoft's lackluster support of mDNS in WSL has me thinking I'm going to launch an NIS/Yellow Pages + NFS/Home Directory server in my house so I can use host names instead of IP addresses for my home LAN with WSL.

I'm just sort of remembering when I worked for Convex in the early 90s. We had a bazillion x/terminals and NIS/NFS, so you could wander around the building and log in anywhere. The X/Terminals knew how to authenticate you using NIS and your home directory would follow you from supercomputer to supercomputer. I think some people had set up virtual desktops so when you logged out of one X/Terminal and logged into the next, your desktop bounced back up right where you left off.

Oh. And we had fiber to the terminal so a couple machines could do video conferencing between our buildings and the UT Dallas campus next door.

Ah. The good old days, when stuff just worked (obviously I'm not talking about video conferencing here. Dang if that wasn't nearly impossible to set up. But everything else was pretty seamless.)

I used to, back when they were a thing: uucp, finger, gopher, talk, wall, rcp, nntp ;) etc. Not for over a couple decades now, though. I don't carry any particular nostalgia for any of them.

I did have to troubleshoot a WAIS[1] protocol issue this week, however. I am the only person in my company who's heard of WAIS, let alone directly used it. Nonetheless, a WAIS server somewhere started malfunctioning and library searches broke and it became a high priority thing.

1. https://en.wikipedia.org/wiki/Wide_area_information_server

I telnet some GET / HTTP/1.1 to some old servers once in a while for old times sake

You might want to check out https://plan.cat

I use IRC and NNTP regularly, and ftp occasionally.

Those are the only "old" protocols I'm aware of that I use, unless you count TCP.

ssh and ftp over ssh.