And it's unreasonable to have never seen this if you're older?? I don't know about you, but I still discover new things despite being twice the quoted age.
My point is that age is irrelevant. "Newness" may be, but that doesn't imply age.
In the proud tradition of founders generally solving problems that mostly affect themselves rather than the rest of the population, I propose the startup idea of a hackers bookshelf startup. Not the first time its been tried, its a hard problem which means its a good startup topic.