The benefits seem clear to me: 

 

 

Plus you can extract more THC from the same amount of herb by heating it up in a vape instead of burning it to where a lot of the THC is lost from the combustion.  
 

From 0.25 of a gram in a dry herb vaporizer you can get around 6-7 good pulls. That's barely enough material for a single bong hit though. 

Yes, and your weed goes so much further in a vape as you said. Many people here are concerned about the (already low) cost of the higher quality weed. But if you use a vaporizer you can likely get at least double the amount of benefit out of your weed versus when smoking it. A rollup will typically use up half a gram and much is also lost as it continuously burns between hits. So in the end a vape can also help reduce consumption cost if you prefer to buy the higher priced good stuff without (literally) burning though so much weed. 

if you like taking little sippy breaths then the dry herb machines are for you ...if you like to hit it back then the dry herb gadgets aren't for you
each to his own of course ...
 

25 minutes ago, wombat said:

if you like taking little sippy breaths then the dry herb machines are for you ...if you like to hit it back then the dry herb gadgets aren't for you
each to his own of course ...

Agreed, to each his own. If you've been a heavy bong head for years you probably won't go vape, but if health and getting the most out of your weed is important then it makes much more sense. Portability and much less odor as well. 
 

Also, you don't just get little sippy breaths out of all vapes. The guy in the video below is getting some nice rips on his and he's using one that you can find easily on Shopee at a very reasonable price:

 

https://youtu.be/oGkwM8_xOmQ