I'm far from convinced about QC yet, but the first transistor was in 1947 and now the CPU in my phone has over 3 billion. Looks like they took 30 years to get from that first transistor to the TMS 1000 with 8,000 transistors on it.

https://en.wikipedia.org/wiki/Transistor_count#Microprocesso...

I just thought that was interesting...