Originally Posted by
mrapollinax
Even if DL goes away you are banking the miles to burn. Why not save as many miles as you can to a single program?
Good point. A slight preference can result in earning as many miles to one program but the cuts in the past few years does dampen loyalty.
If one is really trying to earn miles, credit cards are now the way to go, not flights. Because of the potential difficulty getting awards, I don't use airline co-branded credit cards to try to get miles.