I would doubt that we've seen the peak in ice yet because there's still so many people in developing nations that probably still want the cheapest cars they can get and lack of charging stations and robust grids won't help.

It's possible but probably not in a good way so much as it would mean an extended global recession where only the wealthier people can afford cars... And then that period lasted long enough that the cost for EVS falls below the cost of internal combustion engines globally which then would be certainly the decline of ICE.