Looks like 3nm is nearly here. I saw a video that talked about conductors being only 10 atoms thick.
I think we are about to reach the density wall and end of Moore's Law.
https://www.extremetech.com/computing/291507-samsung-unveils-3nm-gate-all-around-design-toolsI just bought an FPGA development kit that is based on 20nm. I should be getting it within the next
two days. I'm about to step onto the rapid prototyping wagon. What I am looking for is a way to
send my CAD files to an IC foundry to get just a few chips made for only a few hundred dollars. I
can remember the delight I felt after I emailed my CAD files for a PCB to be made and they arrived
in the mail. The same will be possible one day for ICs. I'll be a happy man when that day finally
comes.