I'm just all kinds of help on this subject
Even a 35$ madvapes box mod does the job, but none of them do "everything". When the bat goes flat in your darwin you better have something else to vape. When you slap something else on your Provari or LT you will have to readjust everything.
If it has an amp limiter it may get in the way of using some things on it, but unless you use DCC's or very low resistance atties you will never notice that it has a amp limit. So which one is best has more to do with how and what you vape than anything else.
For the way I vape the best APV is 'more than one'. I don't care which APV someone wants to say is best, if it was the only one that I had it would not satisfy my needs.
Since the Darwin provides 21 - 35 hours of heavy vaping on a charge and also doubles as a pass-through, you would have to be a complete idiot for the battery to go flat. And since everyone but an idiot has a back-up, when you have to replace the battery after 2-3 years of use, that should also not be a problem.
Believe me I'm no idiot! The fact remains that you can not just swap bats on the fly. To some that is a consideration, to others it is not.............
What I object to is throwing out a "one-line" critical remark of a PV with no explanation, leaving the intentional impression that one of the best models on the market will just "die" unexpectently while vaping on it during the day and you will be unable to vape. When you intentionally leave out that it provides consistent full power output for 21 - 35 hours and doubles as a pass-through, which negates the need to carry extra batteries, it proves you are doing nothing but being misleading. But that appears to be your MO.