Here you go.
Both of my sons - mid 20s - learned to ride on the Bonneville and still ride it quite frequently. I don't know if they will ever buy one as their regular ride ..... but they surely enjoy mine!! One son picked up a very nice Kawasaki ZR7 for grad school and the other is still looking around for his first bike purchase.When my son gets to be 50 something he will have a different view of what a classic bike is. Just as my dad did and so on and so on. It matters not to me if the Bonneville is in style in ten years or 10 minutes. I like em and I have one, so. Some of the very younger rides in my area that love the looks of my bike have no idea that it an older style bike.
We have seen nostalgia bike evolution for decades. Harley learned years ago that swapping parts from one bike to another mix-and-match along with special paint jobs can keep the same models going forever! The original Softail gets a new fender and becomes the Deuce. Another new fender, the Blackline.I agree with the sentiment that it doesn't matter to me if the Bonneville is still produced 10 years from now and that parts availability is now and later will be a concern.
But should the Bonnie continue to be in production, I'd be very curious to see how it evolves.