its sorta a trickle UP cycle....... I and some other on this board can remember when the companies or their predessors flew mainly 19 seat or ( smaller ) aircraft with some 30 seaters and 34 seaters thrown in.. Hell the ATR was the BIG mamma in those days. Those jetstreams and 1900's ( yes some still left ) are all but gone today... and the saab is just the next one on the block or so it would seem. Airlines have been getting bigger and bigger aircraft forever...... at ALL levels.........
The SAAB has been a great regional aircraft it will be sad to see it slip away over the next few years.