I've never been a cutting edge sort of rider. I'm often happier getting a great deal on a 1 year old design than paying full pop for the latest and greatest.
I was slow to adopt a few trends. Front shocks, rear shocks, modern geo to name a few. In the last few years my bikes have gotten mostly up to date but not quite the full on low, slack and long that everyone seems to be after. I did try one of those, but sold it as I liked my other bikes better.
Whenever I ride my bikes, I question what would make me want to replace them. They are all really fun to ride and capable. The head tube angles are all between 63.5 and 65.5. The seat tube angles are certainly not the steepest and the top tube not the longest, but they all work for me. I really cannot imagine replacing any of them simply to get something with 2mm bigger stanchions or a 10mm longer wheelbase, or a 1 deg slacker hta.
Obviously most people on here will probably say, if you like your bike, be happy and go ride it. I am wondering, for those who have bikes they bought in the last 3 years or so, is there anything on newer bikes that you think make them worth investing in a whole new rig, or are you happy like me riding "previously cutting edge" bikes?