Yes, I'm well aware that smoking and vaping are very different experiences. Some elements of the smoking experience do not translate at all to vaping. Burning characteristics from cool to hot are meaningless to vapers, as are moisture of the blend and how the cut packs in a bowl. On the other hand, the basic flavor character of different kinds of tobacco seems to apply in both worlds. Differences in taste may be more about the delivery system---smoke from burning versus the ultra-fine mist from vaporizing---than the source tobacco. I mean, when we talk about Virginia's bright sweetness, the nuttiness of Burley, smokiness of Latakia, or spice of Perique, those qualities do seem to apply from one medium to the other.
Literally many hundreds of years have been devoted to refining the business and art of tobacco growing, processing, and blending---all of it exclusively for smoking. By contrast, vaping is a newborn wrapped in swaddling clothes. No flavorings of any kind yet exist that were created specifically for vaping. We're porting everything from different platforms (food and smoking), learning what works and what doesn't.
I did read many reviews from pipe smokers about Steamroller. The usual diversity of opinion applied: a few people loved it, a few hated it, but the overall sentiment was not especially positive, and for much the same reasons as my complaints: too many ingredients, not enough harmony, a vanilla flavor casing that obscured the tobacco, and a general bluntness rather than refinement.
Just recently some discussion occurred on the thread about the differences between purely personal reactions to a juice (i.e., liking it or not) and the more general perception of quality. I feel confident that my "review" of Steamroller as an NET extract was more about its unsuitability as a tobacco flavor than merely my own personal reaction of not liking it. Knowing that opinions vary, I'd still bet that most of my compatriots on this thread would share my judgment about Steamroller.