Cars are a depreciating asset, they never increase in value, and the older they are the more repairs are needed, and the more expensive those repairs become.
Like others on here, I want a guaranteed (4 year) spell of trouble free motoring because I don't want the hassle of maintaining an older vehicle. I have in the past, as we all have, when we're in our 20's and income is low but now my circumstances allow it. I'm not (as so unpleasantly put upthread) "spunking" my money on a lease, I've done the maths, and in real terms, and based on the amount of driving I do between work, family and social, a PCP works really for me.
If I fall ill, if I can't work, if if if, then I take that risk and keep some spare aside in case. I'm not saying that's possible for everyone. I've only done this since my finances have enables me to do so.
If someone goes into a PCP clueless as to what the financial implications might be, sorry, it's the school of Hard knocks, that's their fault. If they don't know the terms of the agreement and end up paying extra 000s due to going over the mileage, surely that's down to them not keeping an annual check of the amount of mileage they committed to when signing the PCP, which will have been an annual figure only they would know how to calculate and supplied to the car dealership.
All financial products in the U.K. are regulated by the FCA with much better, plain-language documents.
The frustrating thing about the whole emergence of the PCP/Lease market is that, in theory, there should by now be a glut of cheap 3 year old cars flooding the market that cash buyers can snap up for a bargain price, yet that hasn't happened.
Maybe you aren't looking in the right places. PCP vehicles invariably get sent to car auctions where they are bought up by dealerships for their forecourt, or in some cases they may be open to the public (mainly the former). There won't just be 1 "glut" from 3 year old cars, it will be a constant churn of vehicles, and the term may be 2, 3 or 4 years. So the effect isn't just one hit onto the market.