"not to be able" in a sense of:

the common user:
1) does not understand physics
2) does not understand what you are posting at all (joints? what the fuck? )
3) thinks "waaa download sth. without a fantastic demo-- no"

Is there any existing project left here, which still needs complex physics - or even more harsh: If you are not using the contribution yourself, i highly doubt that there will be anyone left using your enhancements (really seriously using) besides a maximum of maybe 5 people

PS: 1st: Your documentations are probably the best docs i've ever read (especially for an open source product).

PS: 2nd: Actually as this is pretty senseless you can just ignore this post. It is not relevant to your enhancements, and i do NOT want to start a dumb discussion here.