I think you're misunderstanding?
Ask a high end car dealer how many people pay for their cars outright, they'll tell you only the mad and lottery winners.
If someone has accumulated £50k in savings, and want to blow that on a Porsche, then they're probably fairly savvy with money.
So, do you:
(i) Buy the car outright and blow £50k.
(ii) Invest the £50k at 10%, and finance the car at 5%
Most people do the latter, as that spare 5% is a big chunk of money to just throw away.
Both give you equal enjoyment of the car. I know people will rant and rave about "I own my car outright".... fair enough, that's absolutely fine.
....I totally agree that it may be far more sensible to buy the car on finance (which is why I bought my GTI outright and thank goodness I did because, long story short, I lost a 6-figure sum and am now living off State Benefits and so would have lost the car and my joy in driving her).
But I was responding, mostly to what QD posted, about what else you could buy for the same money and I don't see why that should dampen enthusiasm for what appears to be a great car, the 2013 Cayman S.