Survived Days

Hello, Just want to ask what other players have survived Days, I'm day 123
mine is 931 days. Some other players r over 1000.
443. How many days do you have to survive to get the military base? But also, what happens after that? I get the game is fairly new, but do you guys think they'll add any new mechanics that mix up the game play a bit? Like multiplayer co-op? Or maybe a co-op survival mode? There's not much incentive to keep playing in the long run honestly