Good discussion here. I'd just like to say that neither of my Mighty units ever saw duty as a portable unit and were never carried around or abused in any way; never dropped, never scraped, nothing. They live on my desk at home. I 100% of the time used the unit while plugged in and fully charged. Essentially, I wanted a vape that was as powerful as a desktop vape, but that was portable so that I could take it with me on a vacation without having to pack up a large and unwieldy unit. The Mighty claims to be exactly that, with a 30+w heating element and pass-through charging abilities; no documentation from storz-bickel indicates any kind of requirement to 'use the unit occasionally', and for 400+$ there should not be such a requirement. If there are real limits on how many times the unit can be expected to last, and that number is so low that the units will die several times per year under normal/heavy use, then S&B have a real design issue on their hands, as they are going to lose their ass on warranty replacements.
My first unit's power button dying is crap; it's just a fragile button/switch. The first time I ever pressed it I thought to myself, 'wow, that's a shitty little switch for something that needs to be pressed multiple times every single time you use the unit', so I was careful with the button, yet it still failed. I think the longer auto-off time will help somewhat, since people will need to hit it less to keep the unit on, but the button itself is crap and should be a real switch that has a reasonable life expectancy. I really didn't even care about chipping fins/cracked fins, but when power button broke, or the unit started throwing ERR 004 and not heating, that is a real problem that can't just be whitewashed over and blamed on rough handling of the device.
While some people no doubt do have no issues with their Mighty units, when multiple people are posting that they have gone through 2, 3, and 4 units in a row with failures every time, don't try to downplay the issues just because you happen to have a unit that is still running flawlessly. These are not unique occurrences - totally unrelated people are having the same issues, multiple times. You can assume that everyone having an issue is in some way mistreating their units, but let's be realistic - none of us want their vaporizer to break, and for most people a 400$+ item is going to be cared for above and beyond your average toy.
I am excited to see if the new unit changes has any effect on the longevity of my units lifespans. The really difficult decision I have to make now is whether or not to sell one of the two units when they come back, or to keep 800$ worth of vaporizers instead of a single unit because I expect the unit to die soon and don't want to be without a spare when/if I have to send the replacement back.
Ironically, I don't see extending the warranty as an important thing whatsoever; these units are dying within a matter of a couple of months of use; I'd be overjoyed if they lasted through the entire existing warranty period.