Long term? 10 year agreements (give or take), many of which are several years into them. And that "proves" what again, exactly?

As for the 50% of the domestic market arguement, that is 50% of the block hours and 50% of the flights, but nowhere even remotely near 50% of the actual seats/people. Not even close.

As for scope being tightened, while hard scope reversal is possible, I doubt the mainline groups with so many retirees coming up will bargain for it. However expect to see existing limits stay where they are at some places and scope clauses that forbid the renewing old contracts or the signing of new ones at other places.

Bigger RJ's are career killers at mainlines AND at regionals. The RFP system guarantees that regionals can get planes twice or three times their size for almost zero additional pay or QOL other than that which the top of any one seniority list gets when hyper growth is happening (and those days are gone).