In a recent thread, someone commented:
The reason games are longer is there are many more pitches per game than there used to be. There are many more pitches because the whole philosophy of hitting has changed, seeking one of the three true outcomes. ... Stop with the pitching rules, and the number of seconds per pitch, and the time between innings, and the length of commercials. That's all BS. The problem is, there are many, many more pitches being thrown in games. And so games are longer.
After doing some research, I replied, but the post being commented on was several days old already, so perhaps few people saw it.