Should a CDP be left on 24/7 or shut off & on?

I read once on Audio Critique that digital eqipment should be left constantly on. Over the weekend I had to disconnect my Rega Planet Original for for 24+ hours and, frankly, do not hear any difference from when it was constantly on. This obviously is difficult to A/B.
What do you do with your digital equipment: leave it on 24/7 or power it down when not in use?

Thanks.