If these really are low time low cycle aircraft they'll find another home.
The CASM of the fifty seat CRJ may not make sense as an airplane operating routes, but it can make sense as an airplane feeding traffic.
From our home airport, its ususally one of these or an ERJ as our first flight flying to a one stop connection to most of the world.
There are still plenty of these aircraft flying, some of which are pretty tired.
If these are fairly young aircraft, someone will snap them up.