I'm not so sure what I have mentioned is false as most seem to understand even air creates oxidation as SnapsProvolone has mentioned, but any heat over 120 F and you are degrading product which is why I mentioned "erratic" temps to begin with.
So if there is no heat involved, I would opt for dry sift which in theory is pure product. As for suspended matter in dirty butane, leftover lipids or solvent which does not entirely evaporate at room temperature, the jury is still out because we can't assume everyone is using pure butane or applying a heavier solvent to an initial solvent. The tobacco industry attempted most of this with hexane mid-century and realized the terpene loss as indicative of inferior material.
I'm fascinated with alcohol fermentation and cannabis, but not neccesarily in terms of its practice as an extraction process, more so as a suspension agent ala bhang. The issue beyond heat when using alcohol is the level of chlorophyll you are willing to tolerate in a menstrum, at which point the dialogue becomes how much of it one is willing to combust while ingesting. Should we assume we are to cough any less simply because we are smoking pure THC or would we rather have the sum total of the plant with all terps and flavonoids firing all symbiotic pistons in their "natural" state? As to the retention of a perfect or true cannabinoid profile within the parameter of current science regarding alchohol and cannabis I'm neither exponent nor detractor, besides people have been loving on honey oil and hash oil for decades. I simply view it as a pleasant option and not alpha/omega.