For sure dry vaporizers are more efficient. It depends on usage. A while back I took a serious t-break without fully stopping. Instead I focused on microdosing. I was able to consume 1/10th as much as usual - I didn't actually restock for a whole three months because my consumption dropped.

Long ago I met an older ent who used a massive desktop (Lifesaber) to vaporize 0.015g twice a day. Literally a single gram of top-shelf herb kept him medicated for a whole month.

A lot. Although I use my solo 2 the most. But with my dynavap half a bowl will get me zooted. One thing with vaporizers is that when I mix CBD,CBG, and THC I can keep my tolerance incredibly low. I just mess around with how much of each I put in and it works like a charm. When it comes to smoking for whatever reason it just doesn’t work like that