Great choice of subject matter, as usual, Ken! May I direct your attention to a one-bit machine [1] that's already something of a favorite on HN, posted for discussion in 2014 [2], 2016 [3] and 2019 [4].
"This is not a Motorola MC14500 computer, but it was the MC14500 that introduced me to the idea of one-bit computing. Exploring ways to reduce the chip count, a series of pencil & paper designs revealed the MC14500 itself could be omitted!"