Amd can be quite hard to work with as a small vendor and even though they have a current product with them it takes alot of time, and money to get a new one. If they can
The excuse, which I believe, is that AMD is relatively small and can only do buisness with so many people Whereas nvidia is massive, and multiple smaller companies along with the main one will be in a much better place to supply GPUs.
Completely agree though, I would much prefer an all amd option.