I hope not, but on the other hand we should de-stigmatize a "cautionary grounding". In this regard Boeing should have behaved much more maturely, and immediately propose themselves a grounding of the MAX variant. Thing is, at the end of the day, the MAX was going to end up grounded anyway [it was pretty evident from the onset], and they should/could have handled this a lot better. This is not only proving to be a technical nightmare (with seemingly financial and image repercussions), but also a PR disaster - which was ultimately not necessary.
This is the only confirmed story!
BTW, in nowadays safe airline industry, 2 similar enough accidents for the same very new model are suspect. Also, accidents are usually not 1 factor only.
Assuming the pilots (both JT and ET) were not intoxicated nor distracted by external factors, my non expert guess is:
Lack of sufficient 737max training <airline procedures and/or Boeing manuals
Some defective components < Boeing/supplier
I wonder if the change NG>MAX also was a factor
Look forward to hear the analysis result and hope it can be easily fixed without judgments to the parts involved.