So, this is just me and I have absolutely no desire to debate anyone on this. We all do what we find OUR brains/bodies like best.
For me, that continues to be flower. I do find the effects to be more well rounded and holistic.
I agree that part of the OG thinking with concentrates, particularly for med patients, was that they reduced the amount of draws of hot air taken into the lungs.
Balance that against most 'trates being like taking a baseball bat to your endocannabinoid receptors. Don't believe me, talk to your doc. I believe Dr. Sulak (all over the net) has something to say about this.
As for rosin.....I have a press....I like my rosin, but I do not feel that it really preserves all of the more fragile compounds in MJ many of which are evaporated or damaged even at the relatively low temps we press at. Terps in particular, are very volitile.
Yes, in my med legal state we now have for sale "full spectrum" 'trates. They add in terps, either from the same MJ crop or otherwise....can't really tell. To me, they often taste artificial and I find high levels of terpenes (high being a LOT more than the 1-2% found in well grown flower) to be irritating to my sinuses and lungs. I had one High Terpene Full Spectrum Extract (HTFSE) that tasted like Lemon Pledge smells. Had 11% Limonene!! sigh
I don't see this as an issue to advocate for one way or the other. We all need to do what we find works best for us. For me, that's about 80% flower and 20% 'trates.