Originally Posted by
atflyer
(...) 10-15 kCHF can give you for a lot of years a Priority pass or some expensive credit card, that allow for lounge access and other benefits.......you then only miss the free Economy comfort, but that is only KLM and you can pay for such seats.
Priority pass does not give you access to AF/KL lounges (except in some countries I just learned) as well as fast track at airports, does it? No extra bag neither... No on-to-one chat with the chief purser

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Furthermore, you'd miss one other thing which I find very valuable : the PSL.
They can do wonder. They can issue tickets you cannot get on AF website. For example CDG/HAN/BKK/CDG which I found on ITA MAtrix, but not on AF website. A quick call and the charming lady confirmed she could issue the ticket at the price listed by ITA Matrix.
One more thing is that case of irrop, they go the extra mile to help you. They reissue tickets, change the destination. I got one domestic destination (BIQ) changed to an international one (BIO) at no charge, even though it was theoretically not possible.