Some people don't have a choice either because of home airport location or corporate travel arrangements @:-)
Agreed.
It looks most people who had choices already left DL.
To look at the sticky thread, 2015 SkyMiles Program News from Delta,
the thread looks not so exploded than I had expected.
Actually # of posts/views are fewer than the UA-will-follow thread.
I think this means that the typical FTers already left DL.