I don't buy the argument that regional affiliates and code-sharing are inherently bad, though. For example, there are certainly problems with specific ways regi

I don't buy the argument that regional affiliates and code-sharing are inherently bad, though. For example, there are certainly problems with specific ways regionals have been used by certain airlines (and United is the biggest offender), but the flip side of it is increasing the number of places you can reach by air. There are a lot of cities in the US that don't have enough demand to consistently fill 150-seat mainline planes but can fill 50- or 76-seat regionals.