Has that really been considered 'sound advice' all this time? Getting the best CPU/GPU I could understand, but up until now PC's have been so easily upgradable,

Has that really been considered 'sound advice' all this time? Getting the best CPU/GPU I could understand, but up until now PC's have been so easily upgradable, that I've never heard someone recommend maxing out the Hard Drive and RAM during the ordering process (unless it was to your average consumer). I've always heard (and likewise, advised my 'power-user' friends) to just buy systems with the baseline HD and RAM options, because those components really tend to be a lot cheaper via third parties...