It is a great and surprisingly simple tool in some very specific situations.

I looked into them myself a few years ago on Youtube, sadly it is one of these topics you better not look up on sites with recommendation features.

Like Freeze Dryers, the mechanics behind it are interesting, but the people who are really into it for practical purposes are the sovereign citizen kind of “fuck society” types, and if the algorithm thinks you are one of those, recommendations will be unusable for a while.