Received the same "10,000 reasons for flying with us" email. Humm! A couple of reasons not to:

Last year's status match thingie was a bit of a botch job in so much as the *S comped doesn't come close to OW Sapphire

And perhaps the real reason: BA have been very good to me over the past year and I can live without the distraction of dividing my status earning hours between two alliances.