I was playing fortnite on 2-04-18 22:00 UTC during the "Friends Service" outage.

You couldn't see friends lists at all during that time period. So you couldn't queue up in a friends / people you knew at all in a match, the only options were either playing solo or using a "filled" team with random players.

I've been playing fortnite as one of the early 60k concurrent users all the way to the 3.4M, so its been interesting seeing their load / server issues over time and then reading this (Granted, I don't understand everything discussed in their blog). They've done a outstanding job handling their growing traffic.

One thing I've noticed with Fortnite, compared to PUBG or other MMOs, is how large their patch updates are. Its usually several GB large, and it comes fairly frequently about once a week.