Mechanical Fan VS Electric Fan

Can I add my 2 cents worth to this whole thought pattern?
1) having a properly sized radiator to the engine output is key- no matter how much air goes thru; if you pass 10,000 cfm thru too small or a non-efficient radiator (meaning the heat transfer is too slow to escape the coolant and into air) the car will over heat. Why do they paint radiators anyhow? it slows heat transfer.
2) it is easier on the alternator to make power than a mechanical fan- ask one... sit in front of an electric fan running on a hot day and then walk away and use a mechanical fan (yes like a geisha girl from the orient) which one is easier. (LOL!)
3) Electric fans are cheaper to build and weigh less and more controllable than a mechanical fan. That's why manufactures are using them. Plain economics. PLUS how do you cool a radiator with a transverse engine? ( engine sits sideways in the car like a front wheel drive?)
4)if it is personal preference: personally i like the mechanical fan with a back up electric for those lazy hot days.

Soap box is yours- who's next?