Tesla was just found to be the most dangerous car brand, at literally double the national average of fatalities per billion miles. (National average 2.8, Tesla 5.6 fatalities per billion miles.) The model Y has above 10 fatalities per billion miles. Insurance companies are refusing to insure the Cybertruck and some places are refusing to allow them to park. People have burned alive in Tesla vehicles because they couldn't figure out how to open the doors.

I don't know that engineering principles that lead to horrific deaths and uninsurable vehicles are sound engineering strategies.

And I know some folks are going to say, "but spaceX!" To which I'll say, "Gwynne Shotwell runs that show. That company does everything it can to avoid letting Musk touch things".

Twitter has been steadily declining. Their competitors are absolutely skyrocketing in popularity in no small part to engineering decisions at Twitter. (Though, admittedly, that one is probably less an engineering failure than a policy one.)

But what about the Boring Company, they've... made a few small tunnels I guess?

If these are the results of his engineering principles, I think maybe there's good reason to consider whether they might actually be more harmful than beneficial.