Watch the video. Wedson is being yelled at by Ted Ts’o. If the general doesn’t yell, but his lieutenants yell, is that really progress? I will say that last time I saw Linus, he was very quiet and courteous, but that likely was because it was early morning and the summit-goers were starting to eat breakfast and drink their coffee.
Extension modules are implemented in C because the interpreter is written in C. If it were written in another language, folks would write extension modules for that language instead. Also, it would be less relevant if people used portable C bindings like cffi, which are portable to PyPy and other interpreters… but they don’t.