I got a 50w with Ruida recently, and have been keeping it on for a week now. So far so fine.
There is no “shut down” command in the Ruida, or any laser controller I’m familiar with. You just cut power to it and that’s that.
I’d rather keep mine running. There’s some theory that said turning computers on and off stressed the components more than just leaving it on/ letting it sleep. That’s gotten better now, but still.