Gotta love HN hand-wringing about THC. I've done stupid amounts of research on this. I own multiple dab rigs, multiple Volcanos, multiple DTv4, went through .... lots of carts during 2020, etc.

If you are looking to consume concentrate, the solution is quite easy - get an electronic dab rig, take baby dabs. It's the same thing as "vaping" from a cart, but there's no heavy metals, and at least in WA, the quality of raw concentrates is very high. Not as portable as a pen, but also I'm not really trying to be stoned all the time or in public anyway.