What are these "thoughtful" frontier labs you speak of? I see Meta folks going to the big ones all the time. Ton of former PyTorch/Inductor folks now are at Ant/TM etc.
Everyone I know in the GPU compiler/GPGPU space seems to be either going to meta or leaving meta for NV or some AI lab. My anecdotal observations don't align with "bin meta applicants straight to the trash."