Southwest has no first class. All seats are the same. They do just fine and prices are low. They are probably the most profitable airline of all time in the US.

Southwest has no first class. All seats are the same. They do just fine and prices are low. They are probably the most profitable airline of all time in the US. That most airlines focus on first class/business class as their money maker means they really don't care much about the rest of the plane. Splitting business from economy might make both better? Who knows until it happens.