Warm-up time.

Contrary to some of what has been said, tube electronics warm up relatively quickly.  CJ and AR both suggest about 30 minutes.  SS stuff can take hours.  The advice to leave SS stuff on all the time, especially if it is not Class A, makes a whole lot of sense.

Perhaps being on your second or third drink is making that "warm up" sound so sweet!

My rig is always on, except for my tubed phone stage and I still need music to run through it to get it going.

Both, solid and hallow state equipment are powered up 24/7 and usually becomes puresex after 60-90 minutes of playing music.

Even staying on contiuously I find my system still appreciates about 40-60 minutes playing before it really starts to gel. 2-3 hrs later it's magnificent... All tube: mono bloc amps, pre, and dac.