https://en.wikipedia.org/wiki/Semico...ce_fabrication
If you look to the right, Semiconductor device fabrication you can actually see the computer power advancement over the years. Looks like they are still shrinking it down somehow. The lower the number, the more powerful the computing power btw.
Nm = nanometers
2020 they hit 5nm.
Everytime the Semiconductor manufacturers move to a smaller silicon wafer they have to shut their plants down for like 3-4 months, spend billions of dollars to re-tool for smaller transistors. So they have to do it incrementally or they would lose money.
I'm sure they could immediately go smaller but they have to weigh the costs of doing so. Soon they will have to invent new computers when they hit the physical limit for traditional transistors in order to keep increasing computing power. Like quantum computers, or something along those lines.