There's a lot of interesting research out there as designers having been toying with asynchronous for decades. For example this one sponsored by Intel where th

There's a lot of interesting research out there as designers having been toying with asynchronous for decades. For example this one sponsored by Intel where they put an asynchronous instruction length decoder into a Pentium. https://my.eng.utah.edu/~kstevens/docs/rappid.pdf https://my.eng.utah.edu/~kstevens/docs/rappid.pdf They won on latency and power with comparable area. The issue that blocked it was DFT CAD and the ATE infrastructure doesn't exist for asynchronous designs.