>Accessibility of information quite generally decreases with growing volume.

I find age a big factor, my recall is not what it once was. Perhaps it is because my brain is so full of useless information, for example where to buy the cheapest petrol (gas) in a place I no longer live. I know so many road names of places I may never visit again (one of the problems of moving house so much) I just wish I could archive some of the useless stuff and make room for some more information.