re: Why did the Wishbone go out of style?

Teams run out of the spread now because spreading the field makes the defense declare their formation and scheme earlier. When you have a tight offensive formation the defense can keep all of their personnel jumbled in the middle of the field and the offense has a hard time figuring out what they are going to do.

That is why you see the QB point across the LOS and identify the MLB. they can call out their blocking scheme or protection scheme once the MLB and any potential blitzers are identified.