> Developed and tested on AMD Family 16h CPUs, the last generation whose datasheets document the DRAM controller's translation registers
While security by obscurity isn't recommended, in this case it sounds like it's still a huge hurdle.
Yes, a hurdle to effective security research. Something hidden only appears to have no vulnerabilities. By raising the bar on a mass market product of this sort you ensure that in the event well funded actors develop exploits in secret they won't be inadvertently discovered by the public.
Then publishing it in this incomplete state is just pointless fearmongering and will just make others fill in this information within the next couple of days. And the good guys likely won't be the first ones to do that.