Howdy! Thanks for the intriguing question and thanks to those who have added their two cents.
I love that vaporizing is so much healthier -- even if it is probably not 100% certifiably-good-for-you like eating a piece of organic broccoli, for example.
However, I hang around a lot of people who still combust and I have to say that it's still much easier to fire up a joint and pass it around, or pop a little nug into a pipe, etc. -- fewer people carry around vaporizers, and if they do those vapes often aren't as approachable as a good old-fashioned joint. There is a social thing about that, that has not been completely replaced or recreated yet in the vape community.
I will take a puff every now and then to be sociable but it's so icky compared to the wonderful complexity and freshness that comes from a vape puff. I will often share my vape with folks, but my carry-around model has a teeny capacity compared with what might be hospitable for sharing!
Hopefully the technology will keep marching on so that we can have a small, appealing handheld with a large enough capacity that won't overcook the herb, batteries won't run out, newbies can figure out how to use without a big introduction, blah blah, so that it will be a simple, enjoyable, intuitive replacement for the good old-fashioned joint to pass around in a circle. I know some units have come close, depending on your experience and values, but not quite enough for me (I have five portable vapes now).