Hmm, interesting experiment to be had there. I wonder how much steel/etc you can get from a level 35 planet with maximum population - basically, when does max population stop growing and start shrinking? If it's quite early on, then getting MC at 75-85 like we've been thinking might actually be way off.
Population maxes at about 90-95 somewhere. Not early on.
Food production maxes at about 50-60.