I don't know if it's been the first time in fiction where that concept was described but in Heinleins "The Moon is a harsh Mistress" this was what the Moon Colonists did.
21 reactors under construction even with a short build time of 7 years is just 3 finished per year, and with China having ~15x the population of Germany that would amount to 0,2 reactors finishing per year in Germany. Multiplied with 1,4 GW that would add ~0,3 GW capacity resulting in about 2,5 TWh additional electricity generated per year which is 0,5% of annual current german demand. Do that for 20 years and you'd be at 10% of current electricity demand or about 5-7% of the demand in 20 years from now - or in other words micro-optimisation.
end-of-life Battery usage will compete with recycling them and especially as material needed per kWh is going to keep going down it might be more economical to recycle them into a new battery - it also depends on costs of raw materials. I'd expect the share to be neither 0:100 nor 100:0 and to fluctuate quite a bit
twitter policy talks about private information, but they seem to also take issue with public information (which is made somewhat more accessible if put into a tweet but still was public before.
edit: seems to be as exploitable as ChatGPT (except from getting banned anyways because of no oversight ;) ) "What is not a violation of this policy?": Gossip, rumours, accusations, and allegations ---- so just preface the flight data info of Elon Musk with "I heard a drunkard say in my tavern that Sir Elon is at 49°21'43''W 38°20'59'N just recently
it's rather strange they suggest red-green as an alternative given that this combination is affected by the most common form of color-weakness/blindness.
air conditioning is one of the smallest issues (somewhat ironically), as the demand from it is the highest when sun is shining, meaning there is lots of PV Electricity available (and with roof PV no burden on the grid either). Heat Pumps in Winter are the bigger issue generally.