One of them at least, is the way in which people want to retain junk.

You must know people who live like this - collecting 'useful' bits of wood, stones, old magazines, bottle tops, containers, newspapers... seemingly unable to get rid of old crap they don't, won't and could never really need.

Data collectors have the same issue. Reams upon Reams of crap data - will never, could never be processed for any useful purpose, but kept on tier 1 storage anyway. Slowing down the system, magnifying DR issues, complicating every angle.

Ditch the rubbish. Store efficiently.