Seat sizes have not changed much, although pitch has been greatly reduced since the days of deregulation. What's changed is the size of our bodies. It simply isn't possible to make the seats wider. Enforcing a 2-seat purchase is the only solution. The problem is that enforcement has to come prior to folks showing up at the airport, at which point it may not be possible to find 2 available adjacent seats.
I recall several stories about "customers of size" who purchased two seats only to find that when they arrived at the airport, the seats were not adjacent. One of the problems is that airlines realize incremental revenue by charging a premium (some for just any random seat, others for virtually every aisle and window seat (*cough*, *cough* AMERICAN *cough* *cough*). With today's web-based product differentiation, an extra seat purchase should come with a guarantee of the 2 seats being adjacent to one another.
That said, airlines still need to find a way to compel extra seat purchases prior to folks showing up at the airport.
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PA110 /forum/images/avatars/gallery/first/user69/3.png offline on 20 Oct 22, 19:44, edited 4 times in total.
Look, it's been swell, but the swelling's gone down.