+1

All it takes is a little experience behind the wheel of a Bimmer (any Bimmer).

Almost 10 years at the wheel of both my X5's. No idle at cold start. No engine problems.

13 years into my mother in law's X5. No idle at cold start. No engine problems.

13 years into my SC'ed E39 540. No idle at cold start. No engine problems.

12 years into my wife's E46 330. No idle at cold start. No engine problems.

27 years into my 1975 2002. No idle at cold start. No engine problems.

In the end, there a a zillion other things that can cause way bigger troubles on any engine. You can idle it or don't. If you don't maintain it, it'll die from some other problem.

Arguing about this is about as silly as arguing about whether it makes sense to order a Diet Coke with a Triple Cheeseburger combo.

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