It's going to take Apple some good tweaking to get higher clockspeeds. We don't really know what the ceiling is before it just takes way too much power/voltage to sustain say 2.9Ghz with limited return and long-term degradation risks. If you've ever played with overclocking, you may know how much more it takes to go from say 3.8Ghz to 4.0Ghz (AMD Zen1 chip) to a point where the power inefficiency and extra heat outweighs the benefits to any reasonable person.
I agree. A12z was not really meant for desktop run which explains low base clock speed. Hopefully, their Apple Silicone will be much better.Its not too bad! I mean, already this dev box under Rosetta seems to be competitive with the native MacBook Air. By the way, I'd expect that Rosetta-translated software will run better on the final hardware (it probably will contains some additional hardware support for this kind of utilization).