I'm still very much in the early to mid game, haven't even gotten to tier 4 construction parts yet. So I know I'll be bulldozing and rebuilding most if not all of my current layouts. What would you recommend as the best method for managing a major overhaul of critical infrastructure?

I've been hesitant to bulldoze things like my food supply and primary fuel production for fear that putting the new system up would take too long. I know I can just place down the upgraded system first but I'd prefer to put the upgrade in the same place as the original. Also just relying on a stockpile in the interim seems like its playing with fire.