I wonder whether anyone has since thought of adding the KimKlone to that list.
* https://laughtonelectronics.com/Arcana/KimKlone/Kimklone_sho... (https://news.ycombinator.com/item?id=16564257 https://news.ycombinator.com/item?id=3070169)
* https://laughtonelectronics.com/Arcana/KimKlone/Kimklone_sho... (https://news.ycombinator.com/item?id=16564257 https://news.ycombinator.com/item?id=3070169)
And not just vanilla ones. They have a "monster Z80" that does more per clock cycle and a very fast clock, for example.
https://github.com/hoglet67/CoPro6502