I have been using vaporizers for flowers about 99% of the time instead of smoking, and it has helped but my lungs have still been on a downhill trajectory.
About 3 weeks ago, I completed my project to produce clean hash oil cartridges for clients. I did this only to fulfill their needs with no thought towards using them myself.
Of course, I HAD to sample and test them to work out the kinks. Well, I am now a convert. I have only sampled a couple of bowls of flowers to vape, and that only to analyze crops.
My lungs haven't been this clear for at least a year. And it is so much more stealthy than any way other than edibles.
Just my anecdotal evidence.