Earlier quoted context omitted.
My Latitude E5430 has them on the left side near the back, and two places on the bottom (the rear left side and the front middle).
That laptop is twice as thick as a rMBP and puts out less than half as much heat. Even if Apple put vents in those places, it wouldn't cool adequately; the vent area would be half that of the Dell. To get the same temperatures, airflow would have to be 4x faster than in the Dell. And as I said before, vents on the bottom increase the risk of overheating when used on a bed or carpet. Critics hold Apple to a higher sta…
How's that Kool Aid taste?