There's a second tier of cheap-but-probably-safe that's companies like boundless or healthy rips.

Then there are the fan favorites / esoteric-nerd things like dynavap or the aforementioned basemenet-makers or hobbyist/lifestyle companies. They're not going to hit mass-market volume but they've got the nerds covered.

Pax is killing it with the Era (but that's for concentrates) and their parent company is Juul, so they're well positioned -- but they are not setting the trend of the market at all. They continue to make good-but-overpriced conduction-only units that are increasingly just totally eclipsed by convection/hybrid units with replaceable batteries or alternative heat sources.