@btka great post, your feelings mirror mine....that's why I have 4 GH's, because nothing else IMO comes even close. I figure using them in a rotation will maybe help extend their longevity?
As for the differences.... the clicker is definitely different, way easier/smoother on both the ss and ti models but this has been already reported, same with the very slick smooth operation of the temp dial. I still maintain there is an increase in airflow, and technique must be adjusted to compensate. The flickering is all over the map on the new ones, but I don't give a shit anymore...if the output seems weak, which seems to be often, i'll do the adjustment to backend technique and the next hit will be money.
Other than that, and the newer v2 chargers and batteries, i'd have to do more testing to detect any differences. Sometimes I think that my technique (draw speed, pack, grind, etc) alter results way more than the actual different vapes. Draw speed is massively importantly with the GH IMO.
I wouldn't be too worried about HL going belly up.....the product is too revolutionary...they will persevere or someone else will, but i'm not worried myself. I'm just super stoked that I have these super cool high tech weed toys to play with! Giggity!
EDIT: Check out the Supreme v3 torch vape....it's safe (as long as you don't burn yourself lol), you heat the block and then inhale. You don't even need to grind....amazing flavour, massive thick super smooth clouds.... I actually prefer its vapour quality over the GH, but it's a totally different style of vape. A must have IMO.