I disagree, I would rather use my 400/2.8. I have shot tons of youth baseball/softball this spring and almost all of it with the 400.
Not even a close consideration in youth sports (Baseball, softball, basketball, volleyball, exception for upper age group soccer). Why would one need a 400 when the availability to sit 15-30 feet from home, first or third unobstructed exists. What desireable shot can you get with a 400 of a play from 15-30 feet away that is not better framed with a 70-200? Eyeballs?
I love a 300 for HS football at night but the amount of successful, saleable shots at that venue is still much higher with a 70-200. Take the 300 and 400 to places where access is restricted and "distant" shots are the norm (college and pro venues), that makes sense, otherwise, not even a close consideration.
As also pointed out, how can one compare a 70-200 with 1.4 value for the majority of users on this forum to a 300 or 400 for the purposes stated. A little upity in my book.
)

