New cars are built out of plastic and are thus limited to a 10yr life span, fullstop. Every one of them. Then you add electric to the mix, and in 5-10yrs ur gonna need to buy a new one, no matter the brand, because your battery will fail. The lucky ones get a second under warrenty.

I dont know, i stopped buying new cars once computers were added. I own a 95` landcruiser with 300k on the clock and i beleive it has another 300 which will basically mean it will do me for life. And the advantage of buying and old car, and learning todo the maintence yourself, is that not only do you save money from every angle, your car is on the other side of the bell curve where they start to increase in value again. In the 10yrs ive owned it, my car has increased in value by ~40%. Its made of metal, and is held together with bolts not glue. It will not dry rot away, and rust is easily controlled with modern epoxy paints. It will not go out of fashion given the thirst car collectors of the future will have the past.

My plan is to swap a hydrogen motor in i guess once mature the tech and consequently ban diesel.

This is from someone who in 2005 bought his first ~50k$ car over the internet, one click style, without seeing it in person from a used car guy (it was 2nd hand, 10k on the clock, ~10% of retailm had 2yrs warrenty). Thats really the problem with buying a one-click these days though, the people who buy them are too risk adverse to be without a warrenty or buy second hand. So they crash the value of their own investments because the others know what to expect with seconds on a modern car. The reason people sell cars after 1 or 2 years is many, in my country, leasing cars like this is maximises your dollar vs tax.

Any moden car: ~50k outlay, 10yr useful life

vs

i bought a 2002 rav4 with 400k for ~2k, 5~ yrs ago. Ive spent roughly ~500$ repairing different things on it in that time putting on ~40k because they reused the same parts for this car across many different years and models which means CHEAP CHEAP. It means parts have been copied and mass reproduced on a scale that sees me paying $30 for a waterpump and ~1hr to install DIY on the side of the road not $600 ~ $2k labour for a moden car that requires half the car to be dissaembled to even just see the water pump. And since your modern pump is made of plastic, and all the pipes are plastic, and the pipes are have special numbers of propritiy fittings.... well yes, you see why modern cars suck in terms of investment ratio.

let me show you that math.
~2.5k outlay / 5yrs = ~500$ per year total cost. The car is now worth ~10-12k because people are so sick of modern cars and toyotas keep their value.

2nd hand, high milage, reliable cars (toyota/honda) > anything modern made in the last ~15yrs. The morphing from 1 or 2 modules per car, to 20-100 modules per car with tonnes more emmisions gear IMO is the worse thing to happen to cars since their inception. BUT it has given me a retirement plan ... im thinking about becoming a ECU/electronics repairer once i get sick of tech :D All those modules are pretty much the same, they just allow you todo things via comment instead of lever. Once you learn the basics, its like hacking on VB or JS.