I wonder if the OP was trolling?
Either way:
Render thread, game thread.
Fabrik whole-body solver.
Don’t care about soft body. Ever see it in a game? nope. Because its not worth having.
Rope physics: there’s a plugin for it.
Physx: Its used in tons of games. I’m not entirely sure what you’re getting at here, but it DOES work and it IS AAA quality. Any failure here is generally something you should be looking to yourself for.
Now with that said, stuff can still be improved. But please do some research before posting about things will you?