Pros and cons of leaving your DAC on 24/7

Not only did I leave my DAC on 24/7... I stuffed it full of antistatic foam in baggies.. Left it on for over 12 years. Now I bought a better one, but that DAC is still ready to be used.Leaving a DAC on makes sense.Though depending how hot the case gets... heat is the enemy of capacitors. So if for some odd reason the case gets hot, it would be better to turn off when not in use. Just to keep the caps alive longer.If the case is only warm, no problem leaving it on all the time.By hot I mean you can keep your hand on the hottest part, but it is a little uncomfortable.

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. 

As for how stuff sounds from a cold start, to xx length of time..I find my amp and various preamps sound best after a few hours. from a cold start.                
And the amp, if from sitting for a few days, takes a whole day to sound it best. I do leave turned off one preamp I use just or the phono section. It stays off weeks at a time. And takes about two hours to really sound it's best. My latest tube preamp (Audible Illusions 3A) has a standby which keeps the tubes warm. And it sounds pretty good within minutes of turn on.