At 9 hours for a trip to/from Australia, I am quite prepared to endure a few hours sitting upright and save the money. I am not prepared to pay a 50% premium (which can be 100% on some airlines) just to get a bit of extra legroom and recline for a few hours. So far I have been lucky over the past 5 years or so, in that the flights have not been full and I have managed to score an empty seat beside me.
Airline seat row spacing used to be more when I was a kid. Now it’s like they make them extremely close.
I thought premium economy just means more leg rooms, like exit rows, next to emergency exits, and the like. They charge more for those seats now (when in the past they cost the same).
But it’s not like business class where the seat costs 3x as much as economy.
Or get the China Trust co branded China Airlines card and build up miles when you are not flying plus adding miles when you do. Then get yourself an upgrade.
Many airlines have the 350s now and they feel almost like premium economy more room for your legs better entertainment systems, if you get an old one it sucks though .
The partitions between seats in premium economy (arm rests that do not stow away, are a disadvantage when you have small children who nap / sleep better lying down. Much easier to do across mom and dad’s lap without that unmoving armrest.