one thing I really like about pubg is that there's a time limit on every match – if you are going to play a game, you know it's going to take a maximum of 30 minutes.

It's something that (most?) multiplayer survival action games lack: a defined end point.

And it's not just "play for 30 minutes and then the timer runs out and you lose", it's baked into the game: the zone you can play in slowly shrinks, and being outside that zone becomes deadly, which means the game ramps up over time.