Bag vapes, whip vapes, direct draw vapes, and bong vapes all have their unique advantages and disadvantages. One is not better than the other. Just different.

For one who wants a vape that is totally stealth and makes absolutely no noise, you would NOT want a Volcano.
For one who want to use a vape when their out and about, you can't do that with a Volcano.
For those that want super rich, thick vapor hits without having to crank the temp all the way up or load up a bunch of weed in the vape, bag vapes are not the best choice.
If efficiency is at the top of your priority list, again, bag vapes are not the best choice.

While bag vapes are easier to use and takes out all of the possible user error out of the equation, which makes it a superior party vape, by no means is it the best. No vape is.