You are lucky enough to be in a position to buy a car for cash. A not insignificant amount of cash at that. Many of us are not in the same position, hence finance. Our current Cupra is on a PCP, we have just ordered a new
290 on personal lease, as it works out a lot cheaper per month. Yes, we never 'own' the car, but as we change every 2 years we never did. I wont be concerned by depreciation, at the end of the 2 years I'll hand the keys back and walk away. How we fund its replacement again depends on the deals available at the time. If I had 30k (or even 20k) cash lying about I wouldn't spend it on a car, bricks and mortar would be better. As John Paul Getty said , 'if it appreciates, buy it, if it depreciates, lease it' . And he was hardly a pauper.
Anyhow, its all personal choice. Whatever suits the individual.