Thanks.
Quite a few in Canada as well - Pacific Coastal flies Beach 1900Ds in BC, recently added a few that actually have antiskid which should be useful in the rain and ice on the coast.
Pacific Coastal now operates WestjetLink for Westjet, using SAAB 340s which it has long used.
With old airplanes, maintenance cost is high. Delta did fine using old airliners as it has good technical capability - one of the last operators of the Boeing 717 Mark II. (Douglas MD-95, the original Boeing 717 is the KC-135, with a cameo appearance by what was renamed the Boeing 720 - a short lightweight 707-100.)