I agree with all your points, just wanted to say that transistor count is probably a counter example. We have been keeping with the Moore's Law more or less[1] and M3 Max, a 2023 consumer-grade CPU, has ~100B of transistors, "just" one order of magnitude away from yout 1T. I think that shows we haven't stagnated much in transistor density and the progress is just staggering!
That one order of magnitude is about 7 years behind the Moore's Law. We're still progressing but it's slower, more expensive and we hit way more walls than before.
[1] https://en.m.wikipedia.org/wiki/Transistor_count