Can’t speak for Commutair, but PDT has industry bottom QOL. You will work down to 11 days a month for 75 hours of credit and take 2+ years to upgrade because of how slow our training is and how little we hours we fly.

Expressjet is known for having a top tier QOL.

I think all 3 airlines will be around for a long time, since they are all owned wholly or in part by major airlines.