KLM are offering lifetime PE status after ten years at that level.

"Complimentary lifetime Platinum Elite membership
KLM’s most loyal customers, Platinum Elite FD members, now can be eligible for a complimentary lifetime Platinum Elite membership after having qualified as a PE member for ten consecutive years.* Lifetime members are entitled to all PE services for the rest of their life without having to qualify for PE membership each year**!
*Threshold options may change annually.
**Eligible PE members currently holding an extended membership will receive their lifetime card on completion thereof "


Nigel