I came here from being pretty heavily involved in Reddit. The only thing keeping me there is r/heinlein, I want to keep it going.
You probably know most of us on the society’s board from back then. The Heinlein Forum has many of us, and I even have a little group for those of us who were afh friends back then. If you’re on facebook leave a comment on a post on the Heinlein Society’s page mentioning this and I’ll find you. (Most recent post is better)
There’s a fantastic book series based on exactly this: The Change Series. This is a double storyline with the Emberverse series in which the present time beginning in March 1998 loses electricity and “most forms of high-energy-density technology” due to “The Change”, which occurs at 6:15 p.m. Pacific Standard Time, March 17, 1998.
The companion series, which was written first, is the Nantucket Series, in which the island of Nantucket is transported back in time to 1250 BC due to something called “The Event”, the same Event that caused The Change. But— they got to keep all their physics intact.