That being said; the API does not need to be stable, it should evolve naturally. But it will automatically and naturally become more stable and future-proof if developers do spend more than 2 seconds thinking about their interfaces. Everything else comes from there, naturally, and almost painlessly (it is less painful than the current situation, that's for sure).
Everybody could win, if only the supposedly more clued people would spend some time using that bigger brain that they are supposed to have. Or put differently: by continuing to refuse to work like this, those refusing only prove that they are not deserving of the status that they like to claim for themselves.