On the lower end the 737 has competition from Embraer, Bombardier (and now Airbus through the CSeries/A220), ATR, etc. Turboprops in general (and thus ATR) are

On the lower end the 737 has competition from Embraer, Bombardier (and now Airbus through the CSeries/A220), ATR, etc. Turboprops in general (and thus ATR) are not popular in the US, but they are quite popular elsewhere. But the specific example I had in mind is Air Tahiti Nui, and its grand total of four 787-9. It’s simply an airline specialized in bringing tourists to Tahiti from far, far away. Hence high density 787-9. But even a very small airline like Air Senegal has a pretty diversified fleet, of 9 aircrafts…