As I approach 1mm this would really cause me to think hard. I'm relatively young in my biz travel career, and have accrued most of my lifetime miles in the last 5-6 years. The ability to hit lifetime Gold and have lifetime Platinum within reach is part of the reason I remain loyal and will pay extra / take inconvenient flights when I have a bit of extra time. Having 1k is nice, but it wouldn't be too painful to switch to VX based on where I fly and when. Certainly something to watch closely.