Look at the URL. It’s because the original WSJ title was “OpenAI Chief Technology Officer Resigns,” which was a dupe of yesterday’s discussions. WSJ changed the title yesterday evening.
Even better imo than all the chemical energy we could store when we have excess solar, think about all the water we could create. Creating fresh water from sea water is extremely energy intensive, but there's nothing easier to store than giant bodies of water. Once the energy term is the reverse osmosis opex equation is erased, large scale water plants wherever it's sunny are going to start looking awfully attractive.
The best mental model for a heat pump is that they can maintain a certain temperature differential, say 80F. If it gets to be 0F outside and you want it to be 70? You don’t need to switch to a fully separate heating system, you just need to warm up either the incoming or outgoing air an additional 10 degrees via a small resistance heater. The super wide range heat pump systems will do that automatically, and the principle really applies to any differential you could want.