I guess I must be in the minority because whether a mod will last for 5 years or not is something I don't consider when deciding on a purchase. Longevity is great but I'd rather have a mod that meets my expectations in regard to specs/features even if it "only" lasts a year or so than one that doesn't meet those expectations but will last 5 years.
Absolutely. With the continuing and rapid advancements in chipsets, what is a killer set of features today will be surpassed long, long before the lifespan of a Provari is up. For those who are perfectly happy with an intentionally constrained set of vaping parameters, the Provaris or Reos (insert whatever highly regarded yet limited device brings out the superfans) are the perfect mod and a fantastic value considering their durability. However, for those that enjoy the onward march of gadgetry, if it's built well enough to statistically be functioning in 18 months time, it might as well be a Provari since they'll have upgraded to something new by then.
I admire the Provari for what it is, just like the Reos, but neither suit me, so I vape away on an iPV D2, which at the time I bought it was the best of breed
for my vaping style. I am rather certain that sometime within the year there will be another reasonably priced, solidly built mod that will come out with some feature that I really want, and the D2 will become the backup/alternate (currently occupied by first mod, the iStick 50W, which in spite of some's perception, worked perfectly for me for months until I got the D2). Buying a $50-$100 mod once a year might technically be more expensive than a all but guaranteed 5+ year design for 4X+ the cost, but I can keep adapting gear to my current style for not much more, and as someone attracted to vaping for the gadgetry and tinkering side of it, that is a better value
for me.
If the day comes where I realize I've been happily vaping on the same type of gear for the past year and I see nothing that could be significantly improved or changed, then I'd be looking for something with the sort of build quality and durability of the Provaris that suited that vape gear. So far, though, my vaping journey has been one of iterative improvement, where I carefully select the next step in gear and work it until I know what it can do and what it can't do, and then I select the next piece of gear with the goal of improving upon that. Since I haven't found "the one" yet, I don't see a need to worry about 5 year product durability as a key feature.