Does anyone leave their amp and preamp on all the time?

I found that my trusty old ADCOM sounds quite good and will hold it's own against much more expensive amps, but has to be warmed for several hours before it smooths out and starts sounding good. Since I'm retired, I usually listen to my system off and on throughout the day and quite often late at night, so, when using the ADCOM, it gets left on all the time. Since both, my Rouge and Audible Illusions, tube gear, have soft start circuits and only need about 20 or 30 minuets of warm up, to sound good, I turn them off between listening sessions, to save on tubes....Jim

I leave gear on all the time...with a bit of guilt, I admit.  Odyssey amp takes hours to reach its best. Candela too, and since it’s a hybrid with very low plate voltage, tube wear is a very small concern.  Jolida phono pre-  same story. 
Btw, even if on 24/7, it takes about an lp  side plus for the analog gear to reach full voice...any body else finding that?  Any theories why?  Cartridge warm up?
marantz steamer goes on stand by.  

It's a good question.  One of the reasons I chose the Class D was for this reason.  Runs cooler than most and uses little power, <28W, when on but not in use.  

I turn my integrated amp off, as I don't think it is good for the wear and tear on it to be on 24-7. I also don't think that it is good for my power bill either. It just seems like a wasted drain of power, cash and the longevity of the equipment. 

My PS Audio BHK Mono 300's and BHK Signature Pre have a stand-by mode that keeps them ready to go after turning them on. So it is a 45 second wait and they are off and running fine.