Two things I've experienced with this. First is that there seems to be a half-life on this activity. One day one may ask themselves, what tangible benefit have I gained from all these germs of wisdom and information I've gleaned over the years? Second is that invariably, outside of "hard" disciplines, there's nearly always a counter argument or viewpoint that can be equally compelling.
So for myself, the way two decades of intellectual curiosity manifests is the conversations I have with my kids. They generally think I'm a bore, but sometimes I relate something that seems to give them a spark.