It’s fine if you add new things to your sandbox, but none of that will particularly matter if your game runs like butt. Ensuring that isn’t the case appears to be one of the primary focuses of the latest update to The Repopulation, which patched in a variety of performance improvements and optimizations.
Content retrieved from: https://massivelyop.com/2020/01/28/the-repopulation-improves-island-performance-in-its-latest-update/.