All I’ve ever heard of was that one ‘real client’ (lol) who got it in California somewhere. Seems like that was almost a demo with the length of time it took and all the engineering involved.
Still like to see detailed engineering of how it works (the install) and the detailed process step by step (like we see for the solar panels on YouTube).
People have signed up for a roof for their new construction homes, but I have no idea how long they can wait with some temporary paper/Tyvek covering in place.