[forthfifthsixth]

I don't think asynchronous logic is undesirable.

For an example, the GA144[1] is an example of a practical computer completely implemented asynchronous logic.

Its Asynchronous nature is one of the features, benefits include lower power consumption, faster speed, and lower electromagnetic interference

[1]http://www.greenarraychips.com/home/documents/greg/PB001-100...

[tonmoy]

I meant undesireable in the sense that it takes longer time to develop and harder to debug, but you are absolutely right about the power consumption and speed