I don't know if you've looked around the engine bay of any car made in the last 10 years, but plastic is the norm now. The krauts showed you what was coming before you knew it was the case. Now even american and japanese cars feature plastic intake manifolds, valve covers, oil pans, oil pickup tubes, water pumps. Because quality/cost savings wise everyone else has done the same exact stuff just a decade later, the worst I can fault the germans with is losing sight of what brought them prominence. For example BMW now makes a bunch of generic homosexual fwd crap and the new M5 is such a boat it makes a hellcat charger look reasonably light, mercedes made the new C63 AMG a gaudy looking 4cyl hybrid, and porsche is now as faggoty as ferrari because they overprice the living hell out of their cars and pull the waiting list lifestyle brand garbage. Granted, nobody is blameless. Dodge is discontinuing their only interesting product for an uglier hybrid/ev version, toyota is selling an AWD turbo corolla for 40 fucking grand, lexus cars all look like they're straining to take a spiky shit, ferrari is selling a V6 powered car (now it's good enough to be a ferrari huh? but back in the day it was a "dino" because a V6 was not ferrari enough).
This is also why all of my cars are old.