I disagree. I wouldn't be sanguine about it. Previous major waves of technical innovation were lead by well established Americans. Something has changed.
A plausible hypothesis (not that I'm convinced) is that high immigration has driven down wages in technical professions. So native born Americans are less inclined to bother.
I think it's important to point out that two American eras of high growth and prosperity had essentially zero immigration. From 1921 to 1965 immigration was practically nothing. This was a period of extreme American innovation.