Google Flights shows the leg room in inches, and there's several sites that you can research it on.
However most concretely, back in 2000, American removed a few rows of coach across its entire narrow body fleet to give passengers an extra 3-5 inches of legroom throughout coach. They did not recover the costs and walked it back. jetBlue provides more legroom through all of coach, and even I as a very tall person, don't go out of my way to book them.
Some people will pay more for extra legroom, and I think the current split of seating in planes is likely right around the optimal distribution based on who will and won't pay.
> Two, people can certainly be fooled; for a long time airlines have been playing a game of gradually ratcheting back amenities without being up front about it.
Kind of but not really. Yeah they're not going to put out a press release when they take the olives off your salad. Airlines are an incredibly low margin commodity business. Many years they're negative margins. American's current operating margin is 3.41% [1] This is typical. These aren't B2B SaaS margins we're talking about.
So generally when they take the olives off your salad, instead of putting out a press release they just lower fares on competitive routes. Because most people book on fare or based on corporate contract, which is a second-order effect of fare.
[1] https://www.macrotrends.net/stocks/charts/AAL/american-airli...