The computations are easily parallelized, sure, but the data feeding those computations isn't easily partitioned. Every parallel render node needs as much memor

The computations are easily parallelized, sure, but the data feeding those computations isn't easily partitioned. Every parallel render node needs as much memory as a lone render node would, and GPUs typically have nowhere near enough for the highest of high end productions. Last I heard they were putting around 128GB to 256GB of RAM in their machines and that was a few years ago.