I think you said it all well. I had to get on my toes and make some research after what happened to Binance recently to find out what is the issues with exchanges, why do they rise up to the global rank and then began to have issues. Turns out they either fail in one or two aspects you mentioned. But notwithstanding, we still habe a good number of exchanges up and running at places where other are stopped.

I think traders should keep eyes on them and have a plan of where next to move to if there be any issues.