Maybe I overlooked it, but I missed a mentioning of ladder logic [1] that was often used in process control devices (even in those for homes, I've seen some of those still in use).
There's an obvious translation from the ladder logic to a MC14500B program, so it's easy to replace those devices with a simpler MC14500B device.
I even think I've seen ladder logic mentioned in some of the MC14005B documentation (but it's been some time since I looked at that).