Your fleshing out the math has saved me some trouble and proven quite convincing.Originally posted by SirPleb
So it seems that Longevity will slightly reduce score (in steady state), as EMan says
I'm now persuaded that keeping Longevity for the duration is a bad idea. I may still build it to max out my population in new cities and then sack it. Researching up to that would take time, but so does building aqueducts, marketplaces and hospitals...
Of course that judgement call can wait until I'm done with the tactical phase, which is taking far longer than I'd wished.