I can see fuel cells for aviation if they and the associated fuel storage can be made significantly lighter than Li-Ion batteries. If I pretend there is sudden

I can see fuel cells for aviation if they and the associated fuel storage can be made significantly lighter than Li-Ion batteries. If I pretend there is suddenly no oil I can see them for land transport in off-grid areas or long-haul trucking, but that's not going to happen. Instead what will happen is that electric vehicles will displace where they can displace and oil will continue to power vehicles in the niches that EVs can't displace yet. Transportation is collectively only about 25% of CO2 emissions too, and if EVs displace say 2/3 of that (most cars, buses, delivery vans, some trucking, some farm equipment) it will shrink to being an insignificant contributor. So yeah, I think Toyota is wasting their money.