I get the small market argument for the RJs. For example, UA has the only non-stop service from DEN to several cities in Western Canada, small markets that require an RJ if you are going to have more than one flight a day. But why CR700's on DEN-YYZ? AC flies ER190s on that same route, with $30 extra for an "E+" seat. All seats have inflight entertainment, power, and the ER190 is a cabin you can stand up in. UA flies the CR700 with $39 extra for an E+ seat, has no entertainment, no power, and one lav at the back that is a joke in terms of size. I am finally starting to see some ER170s and ER190s on the route. That's movement in the right direction.