Now that it seems very likely that MCAS was involved in both the Lionair and the Ethiopean accidents, a sad irony emerges namely that the pilots (of the non-accident Lionair flight) who had the least knowledge of both the general MCAS issues and also of their own specific a/c issues, were the only ones who were able to handle the problem. Assuming warnings, cautions and lights were somewhat identical on all three flights - what was different? And what were the significant differences?
I didn't read through the now closed Lionair thread until yesterday and I realize many of the questions, quotes and opinions from my previous posts were already there - my apologies and thanks to Hans, Bernd, iff789, Denti, FCeng84 for their patience, persistence and insight. Kudos to gums for figuring out the gist of it within a couple of days of the first accident!