With the above video we can see in simple terms what went wrong with Ethiopian flight 302. Behind the technical terms of the accident though, we can see a very interesting story unfolding in respect to why Boeing ended up in this situation.
Going a bit further than the video we can see that Boeing caught itself behind in terms of technological evolvement. In order to be able to cover this fallback in due time and stay competitive against Airbus they decided to upgrade the already OLD enough 1960's design 737. And I say OLD enough because even though it has undergone huge upgrades the cockpit philosophy is way behind today's technological advancement.
This time though it was an engine problem in order to be able to conserve fuel. Redesigning the airplane the one and ONLY solution. The problem arising is that once again Boeing decided to just upgrade the existing 737 and to be fair against Boeing this was not only Boeing's fault. The airline companies as well were pushing Boeing to keep the same airplane in order to avoid paying more money for pilot training for a new type. On the other hand the FAA of course backed Boeing on certifying the airplane airworthy to fly having in mind also the big contribution it has on the US economy.
So what was it all about at the end? Everything leads to money. We are living the era of money vs SAFETY. This can also be seen in the increased duty times, lower salaries etc. It is a more broader problem that just a simple MCAS problem which I hope the authorities at some point re examine the whole aviation philosophy.
Nothing has to go against SAFETY even though today's market competition is violating it more every day.