I am young, so imagine how I view these. 

I have no damn clue what's AIM and YIM, I have only heard of MSN once, and that it was somewhat the standard of communication a couple of decades ago. The reason those fields exist, I suspect, is that we're running an SMF version of 2006-09; lots have happened since. At that time, people actually used MSN, Skype wasn't owned by Microsoft, AOL was one very popular website with lots of traffic, and ICQ & Yahoo Messenger weren't shut down yet.

So yes, it's really pointless to have those fields. Nostr is the social media Bitcoin plebs use nowadays.