Legroom is mostly overpriced, people would be more willing to pay if it was properly priced. Paying 50% more doesn't get you 50% more area in the plane.

£70 on a £100 ticket? Yeah no wonder! They're too poor after paying £100 for a checked bag

Or long haul premium economy which is just absurdly priced now, often 100-200% more than economy.

I’ve never done that - I have flown a lot in my life, much of it internationally and the flight times / fewest number of layovers trumps cost.