I have a 12 bit CPU at home that is implemented out of standard 74xxx TTL chips, its called a PDP-8&#x2F;e :-). Not to take away from the Nibbler design, its great, but using TTL logic to build CPUs was a thing for a pretty long period of time (computer wise), probably 10 years from 1971 - 1981. 1981 was the year IBM introduced the IBM PC and a lot of people realized that bespoke CPU architectures were a luxury they could no longer afford.