I do it all; car camp, off road, and backpack. (hopefully soon to be bikepacking). I use some of the same gear, but most of it isn't the same. I might be able to pull of steaks on day one (maybe day 2, but that takes some real effort) but there is no such thing as day 3 steaks backpacking. It would spoil by then. Freeze dried foods, and ramen are the main stays of backpacking for me. Some dried foods, some nuts, some granola bars, and coffee. But all that changes when you are car camping. I consider expedition travel to be much like car camping- 2-3 days without resupply in most cases. Maybe more if you using it as a base camp. But realistically the same, with some minor time constraints for setup time, etc.
Good food is epic for a lot of us, and much more than just calories and sustenance. To those who think like me, a great meal and a glass of good wine while staring at the stars is priceless; some go straight to the wine, while others feel that having a shared meal is a sacred event as old as the bible.
Just reading the Vermont Overland trip reports, those who had meals together- bonded together. Those who did not, did not truly get to know the person. I've eaten MRE's for 5 days, and if you had to do it with someone else, that is a bonding experience, but usually because both are complaining. LOL.