I was able to upload a PowerPlay table to Vega 56/64 on the fly.
No more messy registry hacks. This is getting interesting...
The new miner also has a (somewhat clumsy) way to disable some of
the compute units for reduced power consumption.
I need to run more experiments with that, though.
By the way, my new Ethash kernel made it into ethminer.
(I had no idea for weeks.

It seems that my kernel is possibly the fastest Ethash kernel out there.
I tweaked it a bit, but I don't think it would get any faster than as it is now.