Not just Apple we have multiple other examples of when a unified memory pool outperforms larger non unified memory pools just due to the overhead of having to c

Not just Apple we have multiple other examples of when a unified memory pool outperforms larger non unified memory pools just due to the overhead of having to copy memory manage multiple memory address spaces with all the translation and lookups you need to do etc. We have cheap consumer SSDs today offering 5GB/s of read performance and more than enough I/O to satisfy caching.