Yes, if you have receivers who can't separate, you do not have much of a choice. Or if you don't have chemistry with your receivers or if they run bad or inconsistent routes and the QB can not trust them to be where they are supposed to be.
What made Troy and Mike very unique, especially in today's NFL, Troy could throw the ball before Mike broke his route and the ball would be exactly where Michael was.
This is very rare in today's football. True pocket passers, are becoming obsolete, as GM's becoming more infatuated with the potential of running QB's, who rely on their athletic ability, than there ability to read a defense.