When I was putting my kit together a few years ago (5DMKII, 70-200/2.8II, 24-105, 8-16, 16-35) I beat around the bush for awhile trying to get a good range of focal lengths with primes. For whatever reason I like the simplicity of a few good primes and in the old days I enjoyed my AE-1 immensely with its 35mm and 50mm lenses. But now in the electronic age it seems Canon was letting their primes languish with only these really old designs. So I bought the zooms.
But now Canon seems to be coming out with a refreshed line of high IQ primes, 24mm, 28mm, 35mm, 40mm and a rumored 50mm. All of them with similar high quality (and price). If I knew they were coming out with a 20mm (my favorite) that would cinch it.
Thoughts on ditching my present collection for a set of primes? I'd probably keep the 70-200mm/2.8.