Eh, I bet they are actually quite friendly. Supposedly they both are very nice and I would argue that nobody understands each other's life better than each other. Plus, much of all of this is to their own gain. If AMD killed their GPU division, then Nvidia would be a monopoly and might get broken up or stagnate so a different company could swoop in and kill them. AMD's bet on TSMC is NVIDIA's 4090 gains.
