I'd argue the opposite - that it seems unwise to borrow money against a depreciating asset! That way you lose out twice!
The answer to that is it depends on what the capital is being used for instead.
Most people buy on finance because they don't have the capital to buy outright. This will account for upwards of 80% private new car sales. There is no argument for this other than you want the vehicle and are prepared to pay for it.
However, where Nick comes from is a business perspective.
Lets say you have £40,000 in cash - and you run a wholesale business.
You can buy a £40,000 Mercedes New, and afford it comfortably. You then don't have £40,000 with which to buy stock.
Or, your lease/HP/PCP your £40,000 Mercedes, (paying circa £5000 interest) then use the resultant cash to buy stock which over a 36 month period you recycle three times and make £120,000 or so profit with. Which then makes the £5000 interest look cheap.
Paul Getty is creditted with the phrase “If it appreciates, buy it. If it depreciates, lease it" for exactly the above - He had vast amount of cash we he could then invest and make for more money with than the lending cost him.
Alternatively, you buy something outright for say £10,000 and invest the remaining £30,000 with no interest payments whatsoever. You then treble your £30,000 over 36 months and make £90,000.
That's all fine until the capitalists that run the world make a right pigs ear of the whole thing and the cards all come tumbling down.