Because it will run nicer, last longer, require less maintenance, and the power has a much wider range.
Me thinks more pressure, more HP, on the pistons, rods and bearing makes them live less, not longer
Popular misconception. Piston loads go up in a rather minor way but the forces are greater for a longer period of time below peak. Denser air burns longer so the area under the curve is greater.
As I said earlier, at the end of the exhaust stroke the forces are lower and you're less likely to throw a piston into the head.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
