Now this is the right viewpoint. Cars are liabilities, if you seek investment buy a painting.
I've always bought my cars, never considered Lease, PCP or any of the other weird and wonderful ways to take possession of a car.
Cant speak for others but I find I'm totally happy with my car, then suddenly out of the blue the idea to change comes to mind, Something sparks an interest and once that starts all I want is that new idea to become reality.
I know my car is worth a lot less than i paid for it to others, I know if I trade in I will get a lowball offer, I know the trader will wash it, add £5K and move it on, but that's life, its how it all works. Of course i could advertise privately and get a bit more for it but I know the tyre kickers will come to look at it, all expect to be able to test drive and get offended when you ask to see their driving licence and proof they are insured, they inspect the car with a microscope and find a blemish that to them is the focus of their haggle - yet arrive in a beat up POS.
Its therefore the safest and most convenient method to sell and buy your car from a bona fide trader - and that has a value which has to be paid for - it also legally provides you with consumer law protection - something a private sale does not.
The new car I buy pleases me so much It never enters my head to be disappointed on the losses of the old car, I have researched beforehand what Autotrader values are for my car, I conjure up with man maths just how much I can add to that figure then set out to find the newest, the lowest mileage, the best condition, the most comprehensively equipped car of the type I'm after within my budget.
I find I'm unable to look objectively at that new car from the perspective the dealer is making a lot of money, that as soon as i take possession the car devalues by thousands - and when its time to sell it I'm going to loose a shedload on it, All of that is as natural as breathing.
The new car brings a lot of pleasure, a lot of pride, I have one life and I'm going to enjoy it, not lament on what mightn't have been if i did things differently, I have in laws that have saved all their life, live quite miserly, always prepared for that rainy day - but have forgotten what a rainy day is, they live basic, no frills and live a life without (to me) any pleasure, they tolerate issues with their house that would drive me up the wall simply because they wont spend money - yet they have immense wealth.
You can save it or spend it, be happy or be miserable, life is about choice, If I loose a lot of money on a car I simply conclude the value to me over the years of ownership was well worth it - I conclude that because I've never looked back and regretted a purchase decision.