I just went for it. I followed the directions on constructing a jade emmc installer for pbpro.
sudo buildemmcinstaller -d pbpro -e jade -n
When I booted it onto my pinebook pro, the installer told me it had successfully flashed onto the emmc. However, it only took it 8 seconds to do so, and when I ejected the SD card and turned on the device, I was greeted by my old distro.
I’m pretty sure I did everything right, but am I missing something?