Hey, I just stumbled across a 2020/2022 article in Mother Earth News that actually has some guts.
https://www.motherearthnews.com/homesteading-and-livestock/heating-greenhouses-for-free-zb0z1411zmat/
Rocket Mass Heaters even get a mention. Go figure! From the mainstream POV, M/E/N is pretty fringe stuff. LOL. But traction is traction, and mainstream exposure helps to normalize certain ideas that seem way-out-there.
Aside: Is it just me or has M/E/N started to get a little more muscular and hands-on-dirty in comparison to the "better homes and gardens" version we've seen for a long painful time? I hope so.