OP here, thanks for all the replies.

>>2790358
>>2790465
>>2790845

So the general rule is that premium economy is only worth it if it is around 50% or less then regular economy and if it is 2 times more expensive, it is better to go business class? Got it.

>>2790805

I'll keep that in mind. Any other airliners with good premium economy? Is KLM good for example?

>>2790452

Those are often relatively expensive too, aren't they?