I think that partly this is simply an effect of accumulating experience as you get older. For example, these days it feels like I don't find as much good novel

I think that partly this is simply an effect of accumulating experience as you get older. For example, these days it feels like I don't find as much good novel music as I did before. But of course if I haven't heard any music at all, everything will be novel, and so looking where I have already looked plenty before will not turn up as much novelty. I mean, I can still find plenty of novel thing if I look outside of the top lists of the UK and the US, or look longer back in time, so its not simply that my tastes have narrowed but rather I just have a better overall knowledge, and what I would have found novel before I now recognise as inspired from something else.