Quick response, harder to produce results for a couple reasons.
One, yes harder to invest increasing sizes obviously.
But two, and just as (maybe more?) importantly, there are so many boutique/microcap hedge funds with very very competent people scouring the space so getting in front of them is very difficult and valuations often are not close to as cheap as I like. I still do it, but it is way more difficult than even ten years ago.
OK now back to lurking. :)