Old addage: "If you fail to plan, you plan to fail" applies here. Preventative Maintenance IS important, and does not just apply to changing oil.
The factory knows when they need to cover their asses, and there is no reason they would want to require overhauls any quicker than needed- it hurts business.
The "lazy-fare" or "cheap is better" attitude voiced by some in this thead is what gets people killed and borders on negligent behavior. The statistically-obtained targets that should not be ignored, and Id guess they more important with low use engines (GA) than with often-used (commercial) ones.
