Based on my experience, this is the correct interpretation. Also prior to the required use of Frostbite (fuck that’s almost a decade ago now) you had some complexity trying to get everything working across all your shit and contractors and platforms. After required use of Frostbite everyone had to relearn shit. EA is probably hitting its stride across acquisitions now with that (if not the last several years) so, assuming delays aren’t due them RIFing their talented knowledge holders, some of the efficiency gains are actually from engine familiarity and not codegen.