I thought Dan Holohan sounded familiar, and a quick search showed the excellent talk of his that was posted back in 2017: https://news.ycombinator.com/item?id=1

I thought Dan Holohan sounded familiar, and a quick search showed the excellent talk of his that was posted back in 2017: https://news.ycombinator.com/item?id=18430512 https://news.ycombinator.com/item?id=18430512 About steam heating instead of water heating.