I haven't been on a 550 yet but am looking forward to trying it at some point.

I don't know how old you are. I'm 55, and I remember riding on commuter flights in the late 1970s in airplanes like the Twin Otter and Beech 99. Those were replaced by the Metroliner, Beech 1900, and the Jetstream. (I flew the J32 Jetstreams in my first airline job) Then came the Saab 340, Brasilia, Dash 8 and we had a flight attendant! I even got to ride on a couple of four-engine Dash-7s, operated by Rio Airways, as a teenager! The introduction of the CRJ-200 and E145 was a huge step forward, at the time, to actually be flying a jet. But it's time for them to join the Twin Otters and Metroliners to make way for their successors.