Thats only kinda true. Most places in NYC do not take old oil filters. We're told to dispose of them as normal trash, which I think is a diaster. I have a huge pile of old filters which I punched holes in and have been sitting around draining. ( some for years). They still have a huge amount in it. Oil filter crushers are expensive, so its not like I can have one for home.
Cartridges have got to be easier to burn (less metal). I would think they wouldnt leave too much behind!
As for bumpers... truthfully, the #1 cause of automobile fatilites in the U.S. are single vehicle accidents. Aka, falling asleep, swirving off the road, etc etc.
There's a breakpoint though- A crumble design only works so far. Aka, if you hit a tree at less than 40, its probably a better design. BE hit by a semi.. probably not the best design.