This has been weighing on my mind for quite a while, and I just can't seem to makes heads or tails of it. So hopefully you guys will be able to offer me the sound advice you usually do.
When is it time to replace a frame? I don't mean one that has been damaged in some way, but a frame that is up there in years and will probably never be considered a classic. Its only value is in the many hours of joy the rider gets from it. Do you replace the frame when the costs of upgrading components is significantly higher than the monetary value of the frame? Or do you replace the frame when you no longer enjoy riding it?