Thankfully I don’t fly any more but if I did, I sure as he*l wouldn’t board a 737 MAX regardless how many assurances I got that the problems have been fixed.
There were a lot of smaller airlines around the world that went out of business, which is why Boeing had these unsold aircraft.
But there is still a 4,000+ backlog of orders for the 737 MAX, so they’re not going to go to waste.