I agree with you in principle (my current car is 17 years old) but there is also the question of reliability and repair costs with older cars - especially if you live in the country you need to be able to trust your car, and there can come a point where an old vehicle is no longer economic to keep on the road.
So buying something newer (doesn’t have to be brand new!) is not necessarily squandering. And I do also agree with @JohnH that if you have the money in retirement and are not worried about passing it on when you go, why not indulge a little? (That may not be on a car of course!)
We replaced our Skoda this year because we’re doing 500+ mile drives on a regular basis, but if we’d not needed to do so then yes, running into the ground would have been sensible.
Unfortunately we have no idea how long our money has to last. Our purchases are now based on need rather than want (a concept sadly unknown to most of the younger generations) but it is your life so yours are the only decisions that matter.
Do as you wish , buy a 911 if you can still climb in and out , just promise me that it won’t be an EV - i care about the planet.
I bought mine second hand about 3 years’ old. As best I remember, it went for about 12 years before the prop shaft broke for the first time (it was on a 55 plate). That was over GBP 1000 to replace. I went for the second time about 2 weeks before I moved here; so end of June 2023.
I have always run my cars until they cost more to repair than fix. And yes it was my best car too. So, I’d hang on to it.
I was responding to DrMarkH’s suggestion that Porridge, the OP, should take his rhd car back to the UK to sell it. I neither own a rhd car, nor intend to sell one!
if you say so.