Thank-you for the insight, everyone! So far you have given me a lot to dwell on. I will have to play around with it and maybe do some side-by-side hot vs. cold infusions. It never occurred to me that the primary solvent would be different in a hot infusion (water) over a cold infusion (fat) - at least, as long as I have understood correctly. I'm also super intrigued by the sous vide method. I can't believe I didn't think of trying that out sooner! It seems to me like I may still end up losing some of the more volatile compounds when I heat the cream, but that I will still ultimately have a different result with the cold method.
Many thanks for your input! Please feel free to add more thoughts if you have them!
ETA: The details of "cold fusion" are beyond me! Haha.