15 bags per day isn't hard to work up to in my experience. I've peaked at that with a full bowl (0.5g) giving 5 bags and doing it three times per day. I couldn't see straight all day but it's doable
. My medical use doesn't demand anywhere near that unless I'm careless and let my tolerance shoot up, but for medical users with extreme chronic pain I wouldn't doubt it as well as households where multiple people vape.
The Volcano is marketed as a medical device in some markets and the Medic version is barely different besides something on the mouth piece and a lower top limit temperature. If chambers are still melting on Hybrids, even if rarely, how likely are they to melt on a device marketed as medical?
My October/November Hybrid housing chamber had some small char marks but my replacements, specifically one that I've used the most, is fine so far. There isn't a mark on it.
If a user is having issues as bad as the pictures we've seen in the past then S&B should be sending them a new Hybrid to test out the melting Hybrid unit in house to see if it's something unique to that device.