Just my

since you asked:
I have a Silver Bullet (not technically a true mechanical, but close enough IMO) and two Provari's (variable voltage and loaded with electronic and mechanical safety features).
I have two AGA T2's that I had full intention of using on my Silver Bullet. However, I happen to prefer a cooler vape and use standard resistance atomizers typically because I don't need my vape to have the heat of an analog. I'd rather simply enjoy flavor and vapor production. So, I build my coils around 2.0 ohm and find this extremely satisfying on the AGA's.
I also like to adjust voltage to the particular flavor that I'm using, and I like to frequently change out flavors. For these reasons, I found that the Provari's better fit my needs than the semi-mechanical Silver Bullet.
A pure mechanical mod has very limited safety features. Basically, we're talking about vent holes and a hot spring, which become useful only AFTER a battery has already hard-shorted and begins to vent hot gases. Yeah, you use "protected" batteries or "safer chemistry" IMR batteries, but also keep in mind that the batteries that we use in APV's were not specifically designed to be used or pushed to their limits like they are with an RBA.
On the other hand, variable voltage/wattage APV's all have electonic safety features built into their microprocessors to detect a malfunction in either the atomizer or a battery, and will shut itself down in such an event. Mechanical PV users use mech's specifically to bypass these very safety features because they believe they can not get the "results" they want with the limitations that the electronic PV's provide. Meaning, most of them build sub-1 ohm coils which the electronic PV's refuse to recognize as a safe situation. I guess these people like living dangerously.
As Phil Busardo recently said in one of his rants about ultra low resistance vaping, "Sometimes just because you can, doesn't mean you should." 3:00 - 6:00 minute marks
A PBusardo Rant & Review - The NZonic V3 - YouTube
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AGA T2's on my Silver Bullet and Provari's.