Indeed, it's a very joint like experience! But much tastier.
About the stem getting hot: Personally i don't really have issues with the stem getting (too) hot but when going back to back to back... it can get hot ofcourse. (heating of the stem also heavily depends on the setting/cooling helix used btw)
Anyway: a possible way to avoid touching the hot stem is placing the hot Tempest on the Reolad and hit it while holding the Reolad. The moutpiece never gets hot and you can still flutter the airport with one finger.
I tend to do this sometimes without any specific reason, started when i needed both hands so placed it on the Reload and then just grabbed it by the container to keep hitting it. Kinda liked it so now i do that sometimes but just realized this can be done to handle the Tempest when it's too hot to hold but you still want to vape like right now!!