To be blunt, the mozilla leaders say that pyxpcom was never part of the mozilla codebase. The changes to the binary api started about a year ago. Someone mentioned why make a big deal if the binary api changes if you are discussing py bindings.
I do program quite a bit using C++, it does take longer to develop than using Python. However, for me, at the lower levels, the strictness of C++ and gcc helps keep me in line so that my codebase stays manageable. For me, it is too easy to build an unwieldly Python monster than is hard to extend. On the other hand, I spend considerable more time designing rather than coding my pyjamas' app due to the awesomeness of pyjamas and python.
