clutch fan vs standard fan

Just in my opinion

Standard Fan
-Pros over Clutch - Nothing much, cheaper maybe.
-Cons over Clutch - Direct drive from the engine. From idle to 6000rpm. More load on the engine = robs more power.

Clutch
-Pros over Std - Fan drive is varied by engine temp (cooler the temps, more the fan 'free wheels'. Hotter it tightens up). Given the clutch it will slip and allow the engine the rev 'faster' in most cases.
-Cons over std - ....Cost?