This has been a fun series to track. I used an Alto when I was in college. As an EE, we had to wire-wrap a computer using bit-slice and TTL parts. Definitely the hardest lab component course I took (there were much harder theoretical courses).

So a new Broadwell-EP Xeon chip has like 7 billion transistors. I'm trying to imagine this kind of computer hardware archeology as it will be done thirty years from now.