How often is that a problem, really?
Multithreaded builds (make -j 24) can really hammer the drive. Read and write interleaved, which uses up cache in both directions.
A well proven way to move heat out of a silicon package to prolong its ability to perform at its highest potential. And in a desktop, you've got room for 'em.
Having a fast machine that can sustain throughput and I/O is a perfectly rational desire, and for some of us, need.
