Hey guys!
Do we know the playerbase in Halo 5 in 2018? I really have some trouble playing regular matches, and I still to this day, haven’t found a Warzone match this year. And i mean regular Warzone, not firefight. Is regular Warzone dead? I still to this day, have too many reason I haven’t used 
Are you guys still playing? And which Playlist are you playing?
No one knows what the actual population is, but Warzone is one of the most popular playlists going by the playlist popularity list that is provided in the MM feedback threads. Not finding games could be due to your location if you’re outside the U.S… Try using the expanded search option if you aren’t already doing so.
I mainly play Firefight and BTB for playlists.
Not finding people in Warzone is usually a regional thing or the Xbox itself glitching out.
The 2 most common fixes are searching expanded for the former and doing a hard restart for the latter.
There is a place for everything and in your case the place is the population thread linked below.