> Most people are not flying LA to NYC so that is a minority use case anyways.
This is true, but it is however one of the busiest aviation routes in the US. Certainly you can almost certainly go after some of the busiest routes (New York/Chicago, LA/SF), but where you go after that is less clear.
Regionally it would make a ton of sense over absurdly short flights.
Most people are not flying LA to NYC so that is a minority use case anyways.