You could buy two seats, or pay extra for the ones with more legroom. I think the GP's point, say, is that you could do both (two seats with extra legroom) at

You could buy two seats, or pay extra for the ones with more legroom. I think the GP's point, say, is that you could do both (two seats with extra legroom) at ~3x the cost, so if you're trying to make flights faster you need to compete with that. Indeed, the fact that airplanes are configured the ways they are suggest most flyers aren't willing to pay much at _all_ for more comfort...so it would be surprising if they'd pay a lot more to go faster.