Have you looked at Zero-K? They have some TA history.
TyrianMollusk
How do we prevent this from happening to other instances?
We don't, and we can't. What we need is to stop acting like Actors/People/Groups are single points homed on a single instance. They should be a ring of mirrored instance entities, so the "source" Actor and content are still there when one instance drops out of the ring. Everything is already getting copied around, we're just missing out on the biggest value of that: RAID for identities.
Ie, if I make my accounts on three sites, those should all be me, and it doesn't matter to the fediverse which one I use at any given moment. Same for communities.
That's real federation, not this ramshackle heap of points of failure where we just hope we don't individually get bit too often by shutdowns, even though shutdowns are completely inevitable.
Top-down/twin-stick games where the aim (especially on controller) uses camera handling features, like smoothing the input or a cross-shaped deadzone.
Screenshake enabled by default, or not even an option to disable.