Elon Musk is down-sizing, selling all of his houses, and moving into a small one on Space-X's campus... and his final home that he owns is in San Francisco, which he's now selling on his own, hopefully to "a large family" or else it won't be used as much.
I'd imagine any house that Elon Musk owns is very modern, almost like walking into a computer. It's Smart House in 2021, right?
Well, it certainly wasn't when he bought it. Here's the video from when it was on the market in 2017: