Earlier quoted context omitted.
Today: Most of it gets thrown away and wasted. Tomorrow(ish): We recycle more of it. But your question in many ways is less practical. Statistically cars have lifespans that we can chart out rather well. We can see that we have X tons of old batteries today, and on some tomorrow we'll have X+Y tons of old batteries. Which is important. Industry tends to scale. Working with 100 tons of material may not be an economica…
And - again - this has nothing to do with the question I asked/the issue I was talking about, which is not what happens to batteries, it is about who does the whatever is (considered lawful) supposed to be done with them and how much it will cost me, it remains a VERY practical question. Who (names of the companies) today (not tomorrow, not in ten years time) will pick up my wrecked electric car (and its batteries)?…
So, pull up the phone directory and call any one of those wreckers, ask them if they handle EVs. All of them will say yes.