I think my top was around 60k back in 86 when i lived in Belgium and was much younger and easier on the bones and probably half of those I ended up with a Y class bed having 4 across to myself to sleep on (even though it was People's Express and what-not).
Heck, of my 1.3M lifetime on DL, I'm probably close to 1.2M sitting up front.
I've been spoiled to say the least, but it helped that I was able to schedule my flights based around getting upgraded and leaving from BUF virtually guaranteed sitting upfront for at least 1/2 of my flights.
It's all about the game and how you play it.