This mod is a godsend. However, I confirm other comments about PC performance hit with it enabled. Everything works fine after initial load (saved or new game), but performance steadily degrades with each turn, until it becomes unbearable. I tested this issue with mod disabled, and the game works flawlessly without it: no lags, no stuttering, no FPS hit. I run Civ with 13700k / 4070 Ti, I doubt that this is the hardware issue.