To turn off or not to turn off

Seems to me that electronics (newer) are modern and advanced enough to be turned on and off as needed.

If you have tube equipment, don't even think of leaving it on all the time. Contrary to what some audiophiles say on this site, even leaving a tube preamp in standby mode is using up valueable tube life. Audio Research states, "2000 hours of tube life will pass by in 84 days".

Solid state is another question. However, I think it is logical that there are components that will age faster from being powered continuously.

Solution? Put equipment on several hours before a listening session.

Couldn't agree more. Some people have strange ideas. Sure enough your gear needs to warm up but leaving it on all the time is a recipe for frequent and expensive re-tubing or worse.
Solutions
1. Turn system on and take dog for a walk so you don't have to listen to cold system.
2. Wear ear plugs for first 20 minutes.
3. Play your least favourite LP or CD 'cause it always sounds crap anyhow.

Some people worry about their electric bill go high. In reality it is not that high at all. When amp/preamp idle, it is like having a 60W bulb on all the time. Couple bucks a month.

With a tube gear it is NO-NO since they may overheat and tubes life will be very short.

Dan, it is up to you if you will turn them of or not. If you have never done it, try it for a couple of weeks. The big plus on doing this? Many modern SS equipment take several days or even more then a week staying "on" to get to the best sound, even if they have "stand-by" mode or fully broken in. If you hear no sonic improvement, start turning them off. I never do.

My blue circle dac did not come with an on/off switch. If it is plugged in it is on.