If the boards are not subject to the PMTA (being an unfinished product) that is even better for me. Also this means anyone with a little ingenuity can buy boards and DIY their own fully regulated TC capable device. Just buy the board, a 510 connector, battery sled, some appropriate gauge wire, a soldering iron, solder, and something to use as the housing. For someone with the right tools and some crafting skills, they could make the housing out of wood, metal, or other material and make something really nice.
I bought a DNA 75 hand made device, it cost far more than it was worth but for the future. I "think" that when its board fails then I can un-solder the old board and insert a new one. I have ten boards and ten screens. Prep work.