The issues Edwin Herdman mentioned are important to me.
I don't want to spend my money on larger & faster memory cards, or computer with faster CPU, more RAM, and more hard disks, to process extra pixels I have no need of. I want to spend my money on lenses and cameras, which is - AFAIK - what Canon sells to it's customers.
As example, rather than buy a new computer, I'd rather buy a new 35/2 lens with USM and better diaphragm to improve bokeh.