I see them as a win win. Car costs £20k you pay £20k cash, after two years it's worth £8k you've lost £12k.PCPs are a good way of purchasing a car if you don't have the cash available to purchase what you want.
PCP it and if you owe £10k after two years and it's worth £8k you just VT it. Yes with interest it may have cost you the same, but you've had use of your lump sum to use on other things. I sold my car for £14,000 and put £1000 on the S3, then I bought a new kitchen and bathroom with the other money. I have a new car and the wife has a new kitchen & bathroom win win
My wife's dad was looking to buy an ASX for £20k cash, I asked him how long he wants to keep it for, he said 2 years. Assuming it will be worth £10k after two years, he has to save over £400 for the next 24 months to get back to £20k for the next one. He can lease one for for around £300 per month with £1000 down and still have his £19k cash to do as he pleases.