Having the ability to easily zoom out to 100mm means that I don’t have to switch to my 2nd camera nearly as often. This shot taken at 100mm, wouldn’t have been possible with my 150-500. The thing is, no matter what sport I’m shooting, there are times that the action is close and I need to shoot wide and the next minute, I need all the zoom I’ve got. I don’t have time to switch lenses on my camera. I barely have time to switch to my 2nd camera when the action gets really close. Having a lens that has a good zoom range creates many opportunities for capturing fast changing action. For those times I need a really wide-angle lens, I usually do carry a 2nd camera already set up with a wide angle lens like my Sigma17-70mm f2.8-4.5.