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

That's all very helpful. I never considered the fire risk. My preamp has been modified and there is no off-switch. I could pull the plug I guess. I am looking for a bigger Bedini to bi-amp with. I have a 100/100. That amp ran very hot and I didn't leave it on when not playing. That was when it was working.  I tried to update caps myself and messed something up. Its been sitting for 2 years now. Maybe my next post will be about where I can get it fixed. Thanks for the responses.

I do not leave my equipment on, as my amp and preamp shut themselves down after so many minutes of idle time and with a power unit, DAC and transport, consumes quite a bit of electricity.

It does take 10-15 minutes of play time for my equipment to sound its best.

Preamp no but my amp is always in standby.

My mono blocks consume 230W each in standby mode, so I turn them off after use.  I will turn them on a bit before I plan on listening to warm up and usually by the end of the first side of an LP it sounds just fine.

Like others I leave mine on unless I'm leaving for at least a few days.  Warm-up time was definitely part of my reason, but I had another reason that may or may not be valid so maybe an engineering type or someone more knowledgeable can chime in here?  I noticed that light bulbs and a TV of mine died immediately by turning them on.  My uneducated guess was that the initial surge of current puts more strain on a component (maybe the power supply in particular?) along with the continual heating and cooling of all the electronics.  So I thought leaving my system on all the time may actually increase its life by cumulatively reducing stress on it rather than turning it on and off almost every day.  Was I completely off base?  Will prematurely wearing out certain parts (capacitors, etc.) outweigh any benefits from leaving a system on?  Always wondered about this, and thanks for any thoughts.