I cannot conceive of a situation for 100 consecutive shots unless one is just perhaps lazy in technique and just hoping the rapid acquisition of shots will make up for that laziness or perhaps lack of ability.
There are situations where a large buffer, or a camera body with a fast enough buffer dump (Canon 1Dx II with Cfast, for example) to never hit the 'wall' with respect to slowing down frame rate, is very much a great thing to have. And, it has nothing to do with lazy technique, or hoping for a good shot by 'spraying and praying.'
It does not take long to shoot 50+ frames when you are shooting at 14+ fps, and some great action sequences can last a long time relative to buffer size. For example, when you have a snail kite foraging in front of you and it decides to drop down and catch a snail right in front of you and then hover there for many seconds while it tries to open the snail and eat it. For me, this is a very rare opportunity, and I for one want as many shots of this action as possible. I want the max. number of images, not because I am hoping at least one of them will be in focus or in the frame due to my poor technique, but because the best composition showing the bird's eye, water drops, wing position, etc. is often a fleeing instance among all the action. A small buffer means hitting the fps wall very quickly, and this greatly reduces my chances of getting the best image of a rare bird. I want 14 fps for the whole action sequence, which in this case illustrated in the attached images lasted minutes, not seconds.
A large buffer and a very fast buffer dump rate is a wonderful thing to have when shooting wildlife action.
