@Sharp_Coyote: if most parts for cars are mass produced and interchangeable then unless you break something specific to that car it should be fine later on? I can't see common wear and tear being a problem because the parts would be easy to find

@Odisaodi:

Manufacturers only have a parts supply for a given vehicle for a projected 10 years or so; they are not concerned with you being able to purchase service or body or trim parts for your 2001 Lexus LS430, they want you to purchase a new 2021 LS500

Aftermarket companies might make brake pads or spark plugs or filters for that LS430, but no way in hecc are things like window regulators, gas door release levers, or moonroof cassettes available; one needs to scrounge eBay or wrecked cars for such items.

Odisaodi said:
@Sharp_Coyote: if most parts for cars are mass produced and interchangeable then unless you break something specific to that car it should be fine later on? I can't see common wear and tear being a problem because the parts would be easy to find

Nothing is interchangeable, not even so much within brands, anymore; hecc, not even within model lines anymore.
Everything is stylized, and proprietary.

Aftermarket parts are available for common, wearable items, sure, yet are rarely close to OE-quality, and are only made where there is a large demand. There are tons of aftermarket F150 or Mustang parts out there, yet Mercedes AMG GLA 45? not so much ...

@Odisaodi:

To keep weight and costs down, most auto components are made of cheap alloys, or more commonly plastics; I refer to German cars "Lego Cars" because of their huge plastic content, and in areas where plastic should never be used like water pumps, oil pans and timing covers.

Oil consumption is the norm because of long maintenance intervals, poor emissions equipment and the thin oils for used to wring out slightly better fuel economy. Multiple coolant and oil leaks are common with all of the plastic components.

Cars are safer than ever before, heavier than ever before due the safety gear, and tend to have the durability of papier-mâché because manufacturers are cutting corners while also trying to trim weight.

Once a newer car is out of warranty, I shudder a bit.