Interesting. AA, UA, and CO doesn't scare B6 or VX (DFW, MIA, ORD, DEN) but Delta does?

I mean seriously, WN took over FL to attack DL in their largest hub and B6 and VX (whose product people would love to jump to) can't? And WN, FL, Spirit, US, AA, UA, Sun Country, AC, AS, and F9 seem to be doing at least marginally decent.

Don't get me wrong, I love it when more competition arrives into a market as a consumer, but with all those airlines in MSP, I have to scratch my head at that.