> And there is no indication so far, that a 737 MAX with a fixed MCAS isn't safe.
At this point, that plane has no goodwill whatsoever left to it. The onus is on it proving that it's safe, not on its critics proving it's unsafe, because the only sensible assumption is that it's not safe and that Boeing does not and ill not self-regulate (big duh).
> I think Boeing should have created a true 737 successor long ago and should do ASAP
They announced that back in 2014, and probably several times beforehand.
Issue is demand has seen Boeing push the 737 into 757 territory (years after the 757 got cancelled), it's not that they haven't created a 737 successor it's that their customers don't want a 737 successor, they want 737s so they can just buy the frames and put existing crew on the new plane without retraining.
That's what the 737 MAX is about, and why it's broken. It's the 4th generation of 737 (original, Classic, Next Generation) and the frame can't take it anymore, but 737s is what e.g. Southwest want, because that's literally the only thing they fly.