It has NOTHING at all to do with Badspot possibly being to lazy to put so much effort into the game, it has to do with the fact that it isn't possible with current computer technology.
Did you know that you can play Blockland on dial-up? I wonder if you did. I played it on dial-up for half a year, and guess what? It worked fine, as long as I wasn't in a server with allot of people. Now start thinking about the possibility of physics. 30 players jumping around in the server is all you can take? Oh, I'm sorry, I'm going to try introducing several hundred of objects. Oh, and to make things worse, I'm going to have your computer have to keep track of them all, even if it can't handle it. (the prime reason why physics in v11 will turn off if the computer is having a hard time with it.) Ok, you may be saying "screw those guys with crappy internet, I can handle it!", ok, have your friend start a server with the vehicle limit in the hundreds. Now, place a vehicle spawn, and spawn the largest vehicle you have. Now, start duplicating. Stop when you start to get a little laggy. Now start a minigame and start blasting them around. If you don't want to do this, I'll save you the trouble: You'll find the game will become unplayable, oh, and that is with award winning networking capabilities.