The internet is weird. You'd be surprised at some of the issues that still happen today.

I once had an issue where I couldn't log into the servers of an MMO, despite my internet being perfectly fine. After much trial and error, I figured out that the reason I couldn't log in was because while I played on East Coast servers, all login authentification was done through servers at the companies HQ on the West Coast, and there was a local outage of a DNS server or something out in New York somewhere, which meant that I couldn't reach the login servers. Literally nothing I could do because a line was down several states away and I therefore couldn't play the game.