why a loss of everything on a 2017 TLX Acura???

I'm sorry you're having problems with your Acura. This is definitely most unusual, but with the large amount of electrical influence on operating most of today's vehicles, when something fails it could lead to something like this happening. Unfortunately, without any kind of clues from trouble codes (which I would imagine there would be some, but...), and without getting the concern to happen again, diagnostic results will be difficult. I suggest working with your dealership to secure an alternative vehicle on Acura while they continue to drive and test your TLX.