I think there is a technological path for gradually introducing synchronous design in clocked world: you can give them clocked inputs without problem, and you c

I think there is a technological path for gradually introducing synchronous design in clocked world: you can give them clocked inputs without problem, and you can gate their output at their worst propagation time without problem either. I think with such an easy technological path, there is no intrinsic reason not to have them around us, even exposed as clocked systems. If someone told me today that there already are synchronous blocks in a famous silicon chip I would certainly not be surprised. For example, I'm not a silicon guy so I'm guessing, but adders are generally exposed as one cycle instructions in software, but they still have to propagate the carry on the width of the word, so I guess adders are simply a tree of gate that synchronously propagate and we know the carry propagates faster than the clock tick.