
We run maintenance in order to keep up our hardware and apply software patches and upgrades. If there is no maintenance needed, it is because we don't have any hardware and software doing any work that we need to maintain. As an example, for old FPS games that put out their own dedicated server binaries and connected via internet IP addresses and server browsers instead of via matchmaking, we never had to run maintenance because it wasn't our hardware running the games to begin with. If there's a software-only means of handling multiplayer (e.g. peer to peer) without needing our own hardware, there's no need for any maintenance.

That said, it's also worth noting that Mario Kart actually does have maintenance. It's Nintendo Error Code 106-0811, when the servers aren't available (usually due to outage or maintenance). There's a NinStatusBot on TwitterX that tracks the status for online play, including [Mario Kart maintenance periods].
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