[exmadscientist]

Also, 28nm pays a huge price in mask complexity etc over 40/65nm. So its cost per area is much higher. This works out to a win if your area gets smaller... or a massive loss if it doesn't. And if you just draw the same features with a different process, guess what, your chip cost just doubled (or whatever it is, depending on the particular processes) on the "more cost effective" process.