When I first started tripping, sans famille avec mes amis Quebecois, I slept incredibly comfy in a down mummy bag. I slept wrapped in goosey clouds thru zero temps without a problem. Then when I got into family tripping we borrowed whatever bags we could until better bags became affordable. The kids slept mostly in wool blankets and such while my wife and I "upgraded" to syn recto bags. We were warm, especially the kids. She has always been a cold sleeper while I'm a furnace so naturally she insisted on rectos so we could zip the 2 bags together. Made perfect sense but I missed the down, so when a deal came our way I sprang for a pair of down tapered bags. They do zip together but not perfectly well, being tapered. On warm trips we used them as top blankets. I doubt I'll ever go back to syn bags. It's easy enough to methodically keep down bags clean and dry. Clean up personally before donning dry sleep wear, a dedicated dry bag for the down bags, an airing on the clothesline when we get home. Stored uncompressed. I should invest in liners.
Times change and so do I. While she's still a cold sleeper my furnace has been damped down in recent years to the point where I can feel chilled at night, and for that reason we rely on wool to boost our 0C bags below that temp. Socks, toque, base layers and blankets. Wool blankets are not for gram weenies, as they do not compress and are rather heavy, but they work well for us. They're just one more item to keep clean and dry.