@craftyguy Great update. Thanks for taking the time to write it up.
I recently tried to install #pmOS on my Surface Go 1st gen. It has the potential to be a great x84_64 device for pmOS but flashing to the onboard eMMC is not as straight forward as I had hoped. I think I tried three different ways but I never got it to boot. That was over a month ago though, so I may try again given all the recent developments. In the long term, a USB installer for x86_64 devices would be 👍️.