This is too facile a take, given the existence of Business and Premium Economy.
I think the Asian low-cost carriers probably have it right with very very cheap basic seats, and then the ability to eke out the consumer surplus with reasonably priced “upgrades”. Air Asia’s “hot seats” have a tiny bit more leg room and are charged accordingly. I paid VietJet $6 for premium check-in, and it felt like the future.
Anyway, I suspect the very blunt approach of flight aggregators showing you cheapest first without clearly surfacing comfort factors cause what you describe, rather than an inherent unwillingness to pay among consumers.
Flight aggregators actually switched to providing more of this comfort information (especially Google Flights) specifically because of BE but it wasn't enough to save BE.
Business is paid for by businesses, and premium economy is paid for by, uh, cheap businesses. I think PE was brought in so in times of austerity businesses could avoid negative press associated with buying business-class airfare but still wanted to provide their employees a modicum of comfort so they could hit the ground running off the back of their flights.
LCCs are interesting, because I would argue they support my case: people won't pay more than the bare minimum fare for a flight. They may pay small amounts for comfort upgrades but the butt in seat is a commodity. Hence, legacy carriers who try and cover their costs of 50% less density in coach are going to get their lunch eaten by LCCs who don't as the pricing disparity grows larger.
I think this is probably wrong, but admit I don’t have the numbers to back it up. Last few years I’ve flown ~100 sectors in J and ~20 in PE, mostly intercontinental, and my impression is that there’s a strong showing of leisure travellers, based on the large number of couples and families. Could be expats with decent packages tho.
I think they bolster equally well the hypothesis that people will pay more, but they are guided to the cheapest option by Google Flights and so on, and then don’t price compare add-ons. Hard to know without hard data.
This will not change once
the pandemic panic dies down
Once the pandemic dies down, they can put the seats back in.[1] https://liveandletsfly.com/united-airlines-social-distancing...
I'd pay a bit more for transcontinental flying but, like, I'm very much in the minority and I fly enough to get free upgrades most of the time anyways.