Do you leave your components on 24/7?

Standby switches could be for different reasons. On a remote controlled unit such as a CD player, remote preamp, a standby switch may shut the remote receiver section of the unit off, that is normally needed to receive the remotes signal. On a lot of tube gear, the standby switch shuts of the B+, that feeds the higher operating voltage to the tubes. The filaments would stay on in this type of example, to keep the tubes warm, without the the wear, and extra electric needed. This is just a couple of examples. The purpose of this post is, even when you have a unit in standby (typically SS), the main audio part may be shut down, and cold. These examples aren't always the case.

No I do not;my cd player and pre/processor have standby switches as well as my tubed amps but they stay powered off
unless I plan to listen then they are put in standby mode and left there until listening is done.

For me a majority of my equipment is either off or on standby. The only things that would remain on 24/7 is the gear that doesn’t have a power switch. To me if it doesn’t have a switch then it was designed to be on all the time. Gear I have/had like this a McCormack TLC-1 Deluxe, various Audio Alchemy DTIs and DDEs, my isolation transformers (Tice Audio/Topaz). Ever since I got a Kill-A-Watt and found out what some of my equipment draws either at idle or with a load I won’t leave my gear on all the time. Some amps I have draw 100 watts to 300 watts at idle. I know this isn’t much but it can add up to the electric bill.

No... My system only takes about 15 minutes to fully "warm up" and sound right. And, even during those first 15 minutes, the music is still quite "listenable."

I leave my primary systems on 24/7 (3 of them in rooms I use each day), except for the tube components (preamps). I have several "auxiliary" systems in rooms that don't get much use, and those systems are off except when I'm in the room.