Even if we could mandate all-electric tomorrow, it wouldn't make sense or be feasible for quite a while...
At the moment there's neither the capacity (or materials available atm) to make enough batteries, nor the infrastructure in eletry production, delivery, and charging, nor the money lying around to buy them (outside the West), to replace the 1 billion cars all around the world in any short timespan (say 20 years)...
So let me double down: rushing to electric cars without having the capacity/infrastructure (and without the feasibility to have it even for decades) is a fool's errand.
Japan were world leaders in electric drive trains with hybrids like the Prius. A perfect way to gracefully transition from ICE to all electric. This was almost 35 years ago (1997). But they squandered that lead by focussing on the dead end technology of hydrogen.
Why put all your eggs in the one basket?
I don't even see that as inevitable...