TIL Lux Ult doesn't get canceled by stuns

Because it's an incredibly telegraphed ult that gives you time to dodge. Lux can't change the trajectory, unlike Vel'Koz.

Ezreal and Lux's ults aren't channels. They just have animated cast times. Once it starts it can't be stopped.

Because abilities do not get cancelled by stuns. That's the rule; None of them do.