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‘Energy independent’ Uruguay runs on 100% renewables for four straight months
(theprogressplaybook.com)
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this post was submitted on 18 Nov 2023
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The reference to waste heat could include the heat from burning fossil fuels that isn't turned directly into work. Which is a lot.
So you're right, there will still be some waste heat and the reduction in production needs won't be that drastic. But it's still a significant chunk of the total!
Yes of course, but a lot of energy is currently also used for heating things in cooking steel, chemical industry, concrete, etc. Those processes need energy as heat and directly produce waste heat. I agree it's probably still significant. It's just wrong to reduce energy consumption to "making things move".
Converting energy to power will always produce at least one of heat or light (also radiant heat) in the process.
There is no 100% efficient power.
But, electric is the closest you could get. Especially compared to any petroleum products