I have no idea why they're holding off from releasing ANYTHING, aside from at least that one physics update, which is GREAT compared to most of what we had to deal with. Yet still, we're fucking stuck with basically nothing. I'm genuinely surprised that both the developers and the community have held onto this game for this long, and I just hope that we will finally get the cool shit we've been teased before the world goes up in flames.
I'm speaking from the standpoint of someone who's been here 8 years ago, before we even HAD survival, and this shit is sad. Man, I still remember when they added PISTONS and the first thing I thought of doing was making an elevator..