These new engine technologies are really cool if you enjoy driving performance cars, and it's amazing how it's possible to comply with EPA requirements while delivering so much power, but all these systems add a lot of complexity.
Direct fuel injection, turbos and fancy transmissions are the min technologies which make these powerful efficient cars possible, but they're all impossibly complex to service!
DFI leads to carbon fouling of intake valves, because port fuel injection "washed" fuel over the valves, cleaning them and burning up residue. Turbos are high RPM, high heat parts which have nowhere near the longevity of a modern engine, and there are lots of cars with 8 and 10 speed automatic transmissions to get every last bit of efficiency out of the engine.
All these expensive technologies make for less reliable cars that need more maintenances, and cars are much younger when scrapped because they're simply not economical to fix. Your local transmission shop won't rebuild a 10-speed auto, they'll buy a remanufactured one from a specialist, which costs many thousands.
It's a bummer for a weekend mechanic like myself, that cars are becoming so impractical to run for a long time. I consider it wasteful to scrap a perfectly nice ten year old car because of a bad transmission or blown motor, but there are increasingly more of these.