I haven’t flown a plane as PIC since 1994, but I’m pretty systems automation and computer savvy. Reading the above posts I get the feeling that hardly anyone understands how MCAS really works, not even its designers. It reminds me of the financial crisis a decade ago when the so-called professionals ultimately didn’t understand what they created.
Pages of debate on both this and the Lion Air threads about how the thing actually behaves should be a big red flag, regardless of the actual cause of these accidents.