Been thinking that it would be good if Canon did up grades.
Well, there is an ad hoc upgrade path; it's called buying used gear. On the Canon side at least people often sell low-usage camera bodies to help finance their pursuit of the latest and greatest.
That's how I got a 1Ds2 with about 2400 actuations for about half the retail price when the 1Ds3 came out.
It has certain advantages: you don't have to wait for Lightroom, ACR, and 3rd party RAW processors to support your RAW format. Accessories like custom L brackets are already available.
True, you don't get any bragging rights, but I'd rather put the money saved into lenses anyway.