Something that was invented before becoming cheaper an innovation, unless there was a major drop. AFAIK there has not been for solar. China coming online isn't really innovation. iPhones are cool, for sure. Same with robotic warehouses. Still think innovation has slowed.
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seems as if you’re wanting breakthrough innovations. those don’t come regularly and often aren’t tied to the pace of innovation as a whole.
Sure they come in spurts but shouldn’t we be looking for ways to have more? Disagree with you on the idea that they’re independent of the pace innovation. Can’t have Uber without the iPhone for example.