I've read lots of comments on portable dry herb vaporizers, and they practically all say that the vast majority can't vaporize, but end up burning the tobacco, the excepetion being some very expensive devices. If there were a good atomizer with a 510 or ego connection, I'd want one.
For a while before I was vaping liquids, I was using a non-portable vaporizer to vape tobacco. It was way too strong for me, and I kept working on ways around that, including baking the tobacco a liitle bit before using it. It tasted great, but was a lot of fuss, and nowhere near as effective or enjoyable as standard nic vaping. It wasn't until I bought and started using liquid vaping in standard devices, that I quickly quit smoking.
I was using additive-free tobacco, since I had read that it might be very risky to inhale the added chemicals in vaporized form. I still contemplate getting one of those expensive Pax/Ploom portable dry leaf vaporizers, though I'm aware that you still inhale nitrosomines that way. I'd just use it once in a while, and continue with my usual vaping.