Go shoot a sporting even with those primes. You're gonna miss a lot switching between lenses.
I think I should have spelt out who my target audience was. My question was aimed primarily at landscape, travel and other non sports shooter.
I agree that zooms make life easier for fast action sports. But photographers were shooting the same action with primes at one time, and the results were quite astounding. Yes, it is easier to constantly change the FL in a zoom and frame just exactly, all the while shooting at the maximum burst speed that your camera can manage. That is good enough when you will be publishing newspaper or magazine photos of at the most A4 size. But then why have zillions of MP if < 10MP will do.
I was reading about Canon team setting a whole lot of cameras for winter Olympics, many of them as remote cameras to be monitored from afar, so that they can catch any and every action in the games. That is one approach where you can have one shot in a thousand that will be just right. Alternatively in my opinion, if you have 4K video blazing away at 50fps+ (a rate no DSLR can match), you can select a frame which is just right. At 12MP that is enough for most publications. (
What is 4K Video | 4K Download)