For Krell owners, keeping the amp on all the time?

My Krell KAV400xi integrated sounds best when left on and avoiding the 30 minute warm-up, as my time is limited. The owners manual suggests keeping it in standby mode when not in use. I know reliability is usually calculated by POH (power on hours) how do the rest of the Krell owners consider this rule and might you indeed have a much shorter life out of your Krell if you leave it kept on?

Thanks!
Rpg