To your last paragraph, there's no real technical leadership in LLVM because none of the original contributors are good project stewards, e.g. Lattner is just c

To your last paragraph, there's no real technical leadership in LLVM because none of the original contributors are good project stewards, e.g. Lattner is just chasing the next shiny. There are occasionally some feeble attempts to improve that, but of course people are wary of the potential politics.