[rwmj]

[Genuine question!] Does NVidia have patents etc on CUDA that prevent a competitor from reverse engineering and producing a compatible clone, or is it just that competitors are incompetent (hey AMD)? Or is it that the task is enormous and rapidly changing, like you have to be bug-for-bug compatible with a large, ill-documented API (the Microsoft Windows moat)?

[paulryanrogers]

Competitors have tried. It's just chasing a moving target, so you're guaranteed to be behind and always playing catch-up.

[imtringued]

Tenstorrent is doing pretty well software wise.