I know the examples you give are true, but it's also true that General Motors, the biggest of them all introduced a finished production car to the market, but later withdrew it. Despite all the claims, the reality made it not worthwhile. I'm convinced when things are on the market with satisfied customers, and we are a long way from that.
There are certainly advances as you say, but they aren't practical until we are using them. Until then, they are just the outcome of laboratory work, often with the built in disadvantages that I've referred too.
The best practical example we have of the real situation is the ranges that our bike manufacturers claim, and the ranges that we get in practice, usually about half the claim.
I like future watching and wish that the battery situation wasn't such a disappointing one, but the history is full of failure and has little to show for the immense amount of research that's been expended. In the age of very rapid development fifty years ago we would have viewed with horror the idea that we'd still be using lead-acid batteries in our cars today, but we are, and sadly not a sign we'll be changing soon.
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