Warhol was a hoarder of some renown; he just dressed it up as art.

A great example of his hoarding: he created over 600 time capsules over the last decade of his life (it works out to about one every week) of items (as well as photographs and writing) that he had picked up that he found inspiring.

They’re all held in storage and only about 100 of them have been opened up so far.