As time goes on the answer may change …
There are lots of conflicting google reports
if so how
I understand booting from spi.
I am not able to make a bootable SD card with dd, even with conv=fsync
I can make a bootable SD card with etcher
I put the latest debian image on nvme with dd. It does NOT boot, but with SD card plugged in it becomes root fs and all is normal.
So can nvme boot? will writing the image with etcher help boot?