Inform, the engine this all runs on and we develop in, has released a new version. At first, we couldn't upgrade to it because our massive whale of a game was not quite compatible. We even managed to expose whole new flaws in the compiler that have their devs scratching their head. Still, through preservation and a combined effort from the whole team(including a new guy I barely know!) it's working now!
Difference for you: Minimal. In theory it should be a dash faster and less buggy, and who can argue with that?
Difference for us: Faster, easier to work on, and less forgiving of stupid mistakes that cause things to not work later and leave us baffled.