it's pretty easy to see the days of the U.S. dollar as a reserve currency are numbered. This will crush the U.S. economy for decades.

I think you're right on the first part, so I don't expect the US economy to recover to it's current strength in just a few decades. It might have major ramifications for US businesses in the short term too. Microsoft taking away that judges email has definitely put more urgency behind the concept of digital sovereignty, but I can't imagine that's already visible in data on the US economy. I expect this snowball is actually still very small compared to what it can become.