I was just running a test on it to see how it works for now before I try to actually use render cells. I also spawned the 10k objects on the same space far away from the viewport and it had no visible impact when I used render cells also.
At any rate I had a bunch of garbage behaviors on all my obstacles, getting rid of those brought my framerate up to like 48fps with those 10k obstacles off screen but render cells still doesn't change the CPU usage in that.
I'm basically just also trying to see what a feasible stage size is for my game.