How long do you hold on to a bow?

[OL_JR]

Just a question purely out of curiousity. Wondering how often others replace their bow set ups with a new one and why? This will be around year number 10 with my current set up. I replace strings every couple of years but other than that I've held off getting a new one as it seems do the job just fine, it feels like a glove, and frankly new ones aren't cheap.

I've kicked around getting into something newer but will probably run this one until I'm forced to get another however I'm interested in hearing others opinions.