The conventional wisdom is that we do not. EV’s will take over the world. We just need better batteries to give them more range.
That may be true. But in the meantime, the internal combustion engine is still by far the most popular motor around. And it is likely to stay that way for at least a decade or so.
So if we could upgrade the efficiency of the internal combustion engine, we might offer some real value. It turns out that we have a design that could do that. It is the opposed piston engine.
Hmmm … interesting!