Wow 10,000 miles on the Isle of Wight... isn't that Isle tiny?
Certainly wasn't difficult hitting 10,000 miles, and by "difficult" I simply mean: it wasn't laborious, I had plenty of time on my hands in order to achieve it and...
The key for me was making the rides varied as I my possibly could/can, plenty of audaxes and sportives in places I have never been to before. I would absolutely hate
having to repeat the same routes day in day out, week in, week out as many riders do. Taking new routes and riding new roads is what makes cycling fun for me. For example some people love the thought of Everresting, for me I could not imagine riding up and down the same hill over and over again - Everresting up and down and a "series" of hills as part of a wider effort to achieve the "summit" - now that would appeal anyway that's going off on a tangent.
Looking forward to 2019 which may be even more miles, retain the status quo or less miles for me. The important thing is enjoying the ride irrespective of the numbers and instead discovering new places and meeting people along the way... all this without getting too wet!