yea i agree, unfortunately I don't think they need to offer lifetime. I gripe from time to time but at the end of the day, I still choose CX/KA overwhelmingly and I choose to be in MPC/AM. Nobody is forcing me. I could switch to earning on AA (or, more drastically, I could switch to Qatar/Emirates for second-tier European destinations I visit....I did that a bit between 2010-2012 in addition to CX, and eventually gave it up). I accept the lower earn/burn/lack of lifetime in exchange for what I consider consistent and good on-board service, especially since I buy quite a lot of Y class regional tickets on KA/CX. DM really pampers the hell out of Y class...and hopefully I make it up to them in terms of loyalty and a lot of LH premium flying.

if this forum is based on some type of insider knowledge, however, I'd be quite pleasantly surprised if lifetime came out.