Yeah. I'm not even going to pretend to like such things.. Mechs don't even really care about polarity, and condolences to the chinee: we are not all running away from simple silicone bottles and glow-plug fuel-line ;-)
- I don't see any reason for variation on silicone/fuel-line that just disfavor the enduser. None.
- Nor I am not really fond of mechanicals as more than "well, goddamnit I can still vape"..
- Overdraining a cell in a mech means: "Gee, I need a new cell"
- Reversing the cell in a mech means.. Well, usually nothing.
I think anyone that has vaped awhile is aware they can hack up a MECH in afternoon, with a machined 510 at hand.. So, I am not sure what it is that draws/holds that audience.
Regulated was usually the war between basic VV (DC), PWM and VW; TC adds a layer. I'd even like to see lists of VV, PWM, VW and TC boards so that consumers can compare those boards and costs/values. Evolv and YiHi are pretty-much your ONLY choices for REGULATED BOARDS.
There are dozens of Proprietary boards, and even designs some you can order and populate.. in the latter case, you are certainly expected to be able to solder, order/replace parts and know why you bought it - in all other cases you are - at best - at the mercy of the company and their - maybe - (windows) software. Evolv gets extra points for offering a LINUX and MAC port of their SW.
Semi-mechanicals are not even topical.