This reply is mostly directed at glassgal and p.opus but only because they've both touched on stuff I something to say about.
CONS
1. Like p.opus said, not everyone can afford a Provari. Sure, getting cheaper devices and having to replace them is more expensive in the long run, but some people don't have enough money all at once to spend on ONE device. I'm sorry, but for the price of a Provari I can feed my family for at least three days. Some people just can't justify it. You make do with cheaper devices because it's better than going without.
2. glassgal, YOU may not care about eGo threading or VW, but other people DO. If you've been using an eGo for a while and make the jump to a Provari, just getting the Provari is expensive without having to replace all of your eGo threaded tanks as well. It really seems lazy to me, it shouldn't be too difficult for them to just switch to a different connector. As for VW, I would give a lot more consideration to trying to save up for a Provari if it was VW. I use RDAs enough that it would be nice to not have to readjust my settings every time I switch atomizers that are set up for different resistances or redo my coils. With a my kid constantly underfoot, it would be nice not to have to really fine-tune my coils to get them perfectly right and just be able get the resistance close enough and call it good. My husband and I would be able to share tank heads without having to fuss with different settings, which can be a big deal for him if he just slaps a new head in as he leaves for work. He doesn't get many breaks at work and most of them aren't long, so he doesn't want to spend it trying to get his settings right. As for the argument about setting your VV, most devices that I know of that are VW also do VV and if Provari went that route it really wouldn't change anything for you or any other current Provari user since you'd still be able to do VV. Hell, for all any of us know it would be offered as a different model and the VV version could be completely untouched.
3. As for losing/breaking/anything that would require replacement stuff, it's not me that I'm worried about. I have a two year old, and while I do my absolute best to keep all of my vaping gear out of his reach, the fact of the matter is that if he really wants to get to it he will. Granted, Provaris are built tough, but I'm not convinced it would hold up to being dropped in a toilet or having the buttons mashed aggressively with grubby fingers. My husband vapes at work. He's military, and while they're generally good guys stuff does still go missing. Accidents happen. If it becomes unusable for any reason, I'm out the equivalent of half a week of groceries.
PROS
4. I actually really do like the option of being able to swap out the batteries. If I'm out at a friend's place or out of town visiting family for a few days it can be easier to carry several spare Provari batteries and just charge them when I get home instead of having to stop vaping if charging (even as a pass-through) is not possible.
5. It is built to last. I've never seen one in person, but the testimonies of others say it will last a long while if treated right. If I had a choice, I would rather have a device that would last than one that probably wouldn't. It's basic common sense. It may not be indestructible, but it's close enough that I like it.
6. I do like that it's American made, I like supporting American businesses that keep their production in the country.
7. I absolutely ADORE all of the safety features.
CONCLUSION
It all boils down to the original question, is it worth it? It's a very subjective question, and the answer isn't always yes even if we want it to be. For me, personally, right now as things stand in my life and the current features the Provari has, no, it's not worth it. I'd love to have one, honestly, but it doesn't have VW and it doesn't have eGo threads. VW isn't essential, I can live without that but it sure would make it more worth it. As for the threads, I have to use a cone with my 510 tanks to get the airflow I want. I can't replace my device AND my tanks and still have money to eat.
Something I think people need to realize is that not everyone who says a Provari isn't worth it for them are saying it's not a good device. It's just not worth it for them, be it for their vape style, their budget, or their aesthetic taste. I can look at a car and think it's a great car, but I can see that it doesn't have the trunk space I need, or it doesn't seat as many people as I need it to. That doesn't make it a bad car, it's just not the right one for me. And for all the Provari fanboys out there waiting to convert us non-believers, back the frell off. If we say we're looking at two devices but can't decide which to get, don't tell us to get a Provari. We're not considering it for a reason. If we're asking which device is best for under $100, don't tell us to get a Provari. Some of us have budgets that the Provari just doesn't fit in. All you're doing is making an ... of yourself and irking people.