Yes, unfortunately the game becomes unplayable after a while. Just bogs down and the lag is so frustrating I quit playing.
I’m not that knowledgeable on developing games, but does all the information on the individual population take game resources and slow things down? I hardly use the “Sym” information and perhaps this could be something that you can shut off for improved performance?
I have my settings at “LOW” and the game simply can’t be played after a certain point.