What the C-Series order means?
 

So with Delta acquiring 75 CS100's instead of the rumored CS300's and publicly stating these are a replacement for regional jets, what does this mean for us lowly regional folk? Who benefits? The WO or the other contract carriers? It seems that more major flying being brought back in house would be a good thing....

Keep in mind they're also replacing MD-80's, and maybe even 717's eventually.

They do have the option to convert to the larger 300's.

These will be flown at the mainline, which is good for anyone who wants more high paying airline jobs. That benefits all airline pilots.

However I would expect many of these will be used as replacements not growth for current short routes from ATL and new medium/long & thin routes from SEA & LAX.

The 50 seaters will be replaced with 76 seaters, and the 76 seaters will be replaced by mainline jets. This means DCI will likely be around 350 aircraft, or less by 2025. It's likely that DCI is reduced to only XJT, and Skywest due to their required presence in some markets. They have the government subsidized flying, and the ATL gates.

Yup, Delta's just going to turn up the pressure a little more on Alaska.

Delta isn't going to keep someone just because of a few gates

Let's hope the regionals all go away. Farming out flying doesn't work. I think that this is exciting news.

Seems to look like that's their plan. At least reducing their reliance on them a lot. And what Delta does the other two soon follow. I don't think that they'll all go away though

I'm guessing nobody gets your humor, and I think it's a tragedy.

I think its entirely way to early to speculate on which or which regional carriers are going to gain/lose/retain flying. The CS100 is 2 years out from arriving at Delta. There are many more obstacles between now and then for a good chunk of the DCI carriers.