For prefill, it's basically all that matters. Long-horizon agent tasks, session compaction, file reads and context manipulation will all hit the compute bottleneck in regular usage, incurring several minutes of latency on most Apple Silicon chips, regardless of RAM.

It's kinda why memory bandwidth is an enormous red herring, even for datacenter applications. Nvidia's huge advantage is a compute-optimized GPU architecture and their Infiniband networking, their memory controllers aren't really the star of the show.