Pros and cons of leaving your DAC on 24/7

I don't leave my equipment powered "on" all the time, don't want to consume that much electricity.  My amp and preamp "automagically" power themselves off after so many minutes of inactivity (no way to adjust that), and my DACs throw off a lot of heat, even when in "standby" mode.

I do find that the first 10 minutes or so, my system doesn't sound the best, but after that short amount of time, seems to find its stride.

My DAC is tubed and the manufacturer still recommends leaving it on 24/7 and I do, unless I leave town for a week or more.

Thanks for the feedback. I leave my vintage SS preamp and amp on all the time. But the DAC is newer technology and I didn't know if that made a difference. 

Elizabeth

Were  you serious about the anti-static foam?.......If so why, never heard of that.