An interesting divergence for Rob from the houses are bad drum he likes to beat.
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In most things renting is more expensive.  Cars, for example, are more expensive to lease than buy.  New business models may reduce this, but for items in regular use buying may be better (cooking utensils? seriously?).  If you use a camera several times a month you would likely buy as well.
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That said, moving away from the need to own seldom used items would be good for everyone, and our planet.  But that's really not new.  Our consumer culture has been derided for generations, with little actual reduction.