This idea works well when the product is infrequently used and you can predict the need. If you can't predict that need then it's generally more convenient to purchase. And that's the key term: <i>convenience</i>. People don't willingly inconvenience themselves without good reason.<p>Alternately, leasing works when the item you're leasing would cost too much to purchase outright. But that's not the case with the consumer items they're talking about here.<p>Businesses will often lean towards leasing instead of purchasing because one is normally paid from the Operations budget and the other from the Capital budget. For individual consumers who don't look at finance that way, leasing is about convenience and affordability.
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