The game has less than 3k concurrent players on steam I think. So whatever it is, it's probably not as insane as some imagine it to be
Keep in mind its earily access, which many people buying it didn't really consider and are now crying for it not being polished (given even some journalists whined about it, I guess we can't expect consumers to be smarter). Also it hasn't that much content and the updates ain't adding too much to replayability. Wait for the proper release before you can judge the concurrent player numbers.
