@simon_brooke this gets back to exactly *why* we are hellforming earth in the first place. If we achieve less than 1B people by 2100 (on current trajectory 'much less than' is likely) we could well struggle to make chips, and be using recycled solar panels for silicon.
I prefer the optimistic view that Trump et all will have their oil wars early and hard, pushing everyone else into sane courses of action. The ideal outcome would be fossil exports from Saud/Iran etc stopping permanently.