Indeed, but the way the math for expansion works is that there is something called a Hubble horizon and that makes it impossible to ever reach the edge, since it is moving away from us faster than light. (The limit doesn't apply to the expansion of space-time).
Quite a nifty solution by the Supreme Programmer to avoid us hitting the limits of the simulation. I couldn't have designed it better.
Well it was a more convincing solution than just having level crossing arms come down and an infinitely long train cross every time you get near the edge.
Tell me all your thoughts on God 'cause I would really like to meet her
Disclaimer: To any higher power listening, I am not done living and do not want to meet God/a god immediately. There's still plenty of candy left in this piñata.