Be nice if they fixed whatever bug they have on the Switch 2 that means every replay I previously downloaded[0] is unplayable and further that every time I now try and download a replay, the game crashes.

But then it'd also be nice if they fixed the "game crashes randomly when joining games" bug too.

(To give them credit, it doesn't now take 5 minutes after waking the Switch 2 before Rocket League reconnects me to the Epic servers like it did a couple of months ago...)

[0] Also the stupidly low limit on how many you can download - it's my storage cost, not yours, wtf.

also trackmania, and it's a common way they use to catch cheaters as pb on leaderboard have inputs

This[0] is a good intro to the topic (see also [1] for the written report)

[0] https://www.youtube.com/watch?v=yDUdGvgmKIw

[1] https://donadigo.com/tmx1

Replays are very common in fighting games as well, rollback netcode gets you most of the way to a replay system already (replaying game state from inputs is a core requirement for online play)