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

Left my SA-9900 Pioneer integrated on for 32 years unless I left town was the only time it was turned off.  I have a 1980 mosfet SoundCraftsman that I never turn off.  My 77 Marantz I turn on the night before I use it.

Hi everyone this is my first post. I don't know if you're ever up all night but it seems like the electrical companies in my area must move power around at 3 or 4 a.m. which sometimes looks almost like a brown out by the time it gets to my house. I unplug all of my equipment when I'm done listening. If it's disconnected from Power surges and brownouts there is no way they can hurt you. I also have a recording setup which I connect to a few Tripp Lite dual conversion systems that create AC from DC I unplug those When Storms are coming. I'd rather wait for something to warm up then wait to buy a new piece of gear.

My Herron Audio M1 amps are on 24/7 unless I'm away for more than a couple of days.

I have a Bryston 3B-NRB power amp, more than twenty years old. The only time it’s been off in the last 7 years has been during power outages & overnight+ trips. It’s warm, but not hot. I’ve read of studio installations with Bryston gear that was powered on for over twenty years and still going strong. Bryston does have a 20 year warranty, so I’m not worried about anything bad happening to it due to it being switched on non-stop.

I leave my Aragon on all the time. Another thing to considered for solid state is that on/off cycling increases the chance of component failure. The heating and cooling accelerates metal fatigue. Electronics manufacturers will repeatedly power cycle devices to weed out early life failures. The down side is that it also shortens the life expectancy of the device.