What's the use case of 20 nm chips? I understand value in 3D printers for electronics, but what is unlocked at that level? Replacements would require design files, so I'm thinking more of what is unlocked at 20 nm for open-source designs or at hobbyist creations
30 years ago in 1994 we had 1 micron chips. Can you print your own 1 micron chips at home today? No. You can make PCBs at home today but no chips.