I think that the TinyTapeout concept is super cool (https://tinytapeout.com/). In the past, it was not really feasible to design and manufacture a semiconductor device as a hobbyist... Unless maybe an extremely wealthy one.
Now, we have open source design tools, open process design kit, and the ability but small part of a manufactured wafer.
There are also now multi-project wafer runs for photonic chips at reasonable prices for startup/academia. I think these developments are pretty cool.




Since my work involves sensors, I set up a continuous testing setup on a raspberry pi and got its IP whitelisted. I ssh into it when something is annoying to do in the Windows laptop.