This response is less about the technicalities of the cause/s of the crash/es, and more on the wider industrial implications, but I hope it is still welcome
According to this article from CNBC Garuda Indonesia has cancelled (or is seeking to cancel) an order of 49 737MAX aircraft. Only a few days ago I saw an article suggesting that perhaps Ethiopian Airlines will look to other manufacturers in the wake of the crash.
From a global perspective, it will be interesting to see how the international airline industry responds, and how Boeing is affected, by these incidents and their consequences. Have these crashes decreased confidence in Boeing, and if so, by how much?
-S