[hakfoo]

Amenity discovery is a lot harder than price discovery, so people are going to decide based on the info they can obtain easily.

It would probably be very difficult to reliably compare flights on plane-specific amenities (if the plane ends up being different than the originally scheduled one, and the seats are narrower, do I have financial recourse?).

But even airline-level rules are buried five screens deep in checkout and not necessarily directly comparable. Again, is there recourse if they say "we shrunk the carry-on allowance, or introduced a new super-terrible boarding process after you booked"?

The one amenity advertising that worked for me: Southwest makes a big point of advertising free checked bags, to the point where I'd make it a point to cross-shop them, except they never seem to be going where I want to go.