I’m most curious what 737 Max pilots think. Are they comfortable flying this plane tomorrow? I assume we’ll be hearing from them and their unions in the coming days, and would put a good amount of trust in what they say (they are the ones who know the airplanes and are at personal risk of death if things go wrong).
I think you'll know tomorrow -- if the airlines have a mass sickout of pilots scheduled to fly the 737-MAX, then you'll know that they aren't comfortable flying it.
If any pilot had any serious reservations about the safety of the aircraft, I can't imagine them flying.