Borrowed from Manny
As I have related on other boards, this rule has nothing to do with "what ifs", but more of "what could ofs"
Nope. The rule is essentially the same in virtually every code I'm familiar with in both baseball and softball. The only differences I know of is when an IFF should have been called but wasn't. Some codes will allow the IFF to be retroactively enforced (especially when a force-play DP is turned), and others will allow for the play to stand, given that runners and coaches should know when the IFF should be called.
Many clinics I've been to teach that the IFF should be called when the ball reaches its apex. Yeah, that's going to be the case when the pop-up is routine and the infielder doesn't have far to move to make the ordinary effort catch.
But, like in this play, the infielder may have to move a significant distance to get under the ball, and by the time that happens, the ball could be pretty close to the end of its travel. So an IFF call could be late, even though it's appropriate.
I have no problem with the call here. F6 did have to go pretty far, but he was in position to make a catch, and the moment that happened, LFU made the call. It was immediately afterward that F6 decided to bail to give F7 the play.