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As I've said elsewhere, I'm not entirely against regulation, but there should be options available that are not government regulated so long as it's clearly made known that the product has not been certified, and that the owner assumes a higher level of responsibility.
I'm still not impressed by a 20 lb chair, even if it meets crash regs. Heck, that's about the weight of the frame of our entire EV car.
Besides all that, electric drive trains are making it less important to reduce weight for efficiency sake. You can put very powerful motors in a compact space to propel a heavy vehicle, and you can capture much of that energy in regen when bringing it to a stop.
That's not to say weight isn't important, it's just less important than other things.
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