Yeah, it seems at a certain breaking point in the difficulty curve it becomes “catch up with the AI boni”, which made it a completely different game for me. And as you said, usually by renaissance you know if this is going to be a landslide victory (which at that point becomes a chore), or if you’re screwed.
I guess every religion old enough has such kind of loopholes. I know from Roman Catholic that there can be made up so many exceptions that the 40 days of lent before Easter books down to a few days of actually fasting. No lent if you’re travelling (commute to work counts), no lent if you have guests, and of course no lent if you are a guest somewhere else. And Sunday is exempt from lent anyways.