Because once you’re in a PCP you will probably find you are liable for most of the interest payments anyway even if you pay off early as you’ll pay them as penalties and you get the worst of both worlds.
100% incorrect, there is a very clear formula used to calculate PCP interest and early repayment penalty. Last time we did it was with our Lexus, I believe we were charged just 2 months interest as early repayment on a 48 month PCP deal, that was against the dealer giving up around £5K worth of 'incentive' to buy it on PCP.
From memory it essentially worked out we 'lost' £200 of the £5K dealer contribution due to settling the PCP early, but saved about £3k+ in interest payments if we had the PCP deal run to its completion.
There are very few situations in life where NOT settling debt is better than keeping debt going. There is no such thing as 'free' money/loans, there is nearly always interest been charged some where, the sooner you settle the better and this applies to mortgages too.
BUT Currently additional mortgage is borrowing is at just above inflation 1.2% deals are around, so there is a financial argument to say taking out additional mortgage borrowing now to spend/invest is nearly cost neural, and indeed if you 'lock' in the rate and spend all the money now and inflation ramps up you have gained assets.
BUT this still assumes you have the capital to pay additional borrowing within a short period, otherwise you are actually worse off as mortgage borrowing is one of the most expensive forms of debt due the length of the loan even though the APR rates are low - Look at your mortgage account you will see anywhere between 20-40% of the payment every month you make is actually interest despite the headline figures of low APR rates, its legalised loan shark rates.
None of that applies to any form of car loan/financial products - HOWEVER if you really don't want to pay cash for some reason and want to keep the capital safe, additional mortgage borrowing to finance the car is almost certainly cheaper than any other form of borrowing, but with the plan to settle the entire balance in 3-5 years.