Motion sickness for one.
Good question, we took trains through multiple countries in Europe and most trains had forward and rear facing seats. I noticed no difference in the feel when moving.
Where the heck would you even put your feet in that arrangement? No thanks, I have enough social anxiety as is. If I got on the plane and was flying from LAX to Hawaii and when I got to my seat, that was the seating I see, I would turn around, say excuse me 57 times as I plow my way to the front of the plane and walk right out of that airport and go rent a rowboat and start the four months of rowing to get there before I would plop my butt in one of those seats.
Since I mentioned Southwest, I figure an article and photo are in order. I distinctly remember them.
https://simpleflying.com/southwest-airlines-unique-seating-arrangement/
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If I had to sit backwards on a plane, I’d beAs a person who is sensitive to motion sicknessmany times over. I can barely handle the regular seating. Oddly enough, I'm fine on a boat.