the 'agreed' solution was for scrapyards to have a skip / container of sufficient size available
20ft shipping containers are plentiful, open-top ones maybe a little less so, but if you're going to use it as a smothering pit that's sitting in a dedicated section of a scrap yard you just need to cut a large enough hole in the top and not really bother with the full transportability requirements of a certified open-top. And if you smother with sand there's no worry of polluted water leaking out; the sand can be reused although it has to be stored in the meantime and probably cleaned occasionally. Neither of those is a big and tough to solve problem.
the scenario of a traffic jam of cars going up in a wildfire
Looking at what's left of a car, EV or not, after a wildfire there's little more to do than shred it and throwing the bits into a blast furnace with the rest of the feed. If you're talking about a mass fire after a motorway pileup you may have a point, but for those the number of EVs involved will likely still be low single digit for the next couple of years.
Biting the hand that feeds IT
