I think it depends on the scale of use. Are we going to need both technologies, both battery electric and fuel cell electric, depending on the use of the vehicle?
At the end of the day, a fuel cell engine is very similar to a diesel engine, but much less complex. There are many fewer parts operating at a high temperature and many fewer moving parts. The cost of producing a fuel cell engine at scale, when you reach 10,000 engines or 50,000 engines per year, will be at parity with a diesel engine. I think on the cost we'll get there.