Mood: R U thinking what I'm thinking?......Oh dear!
Whats wearing out?
There are a few items that wear out on a Duke but nothing I can think of is bad enough to make it uneconomical to repair.
The older bikes have hit the bottom and their value isn't going to fall further.
The older bikes are more expensive to maintain generally, but does it really make economic sense to throw thousands at a new bike to save a few hundred per year on service costs?
I wouldn't say my service bills are getting higher in any linear sense. It's cyclical. If one needs belts, or fuel filter etc, it costs a bit more that year; and if the valves need doing, a lot more, but that's irregular. So I don't see the correlation between age and cost myself.