Do you leave your SS amp on all the time?

Pro: Leaving any component on all the time tends to keep everything thermally stable and avoid thermal shock: light bulbs fail most of the time when they are first turned on.

Con: Some amplifiers (e.g. Krell class A rather than class AB push pull) run so hot in idle that turning the amp off while idling is recommended by the manufacturer.

Yes, on all the time, except during thunderstorms when I shut down and unplug everything.

I turn mine off. If I had a Class A/AB amp I may leave it on, however my amp (Threshold T400) is Class A. Too much money, too much heat. It seems to 'warm up' faster being a class A amp though.

I used to, but the designer of my Carver A760x amp told me that it was dumb. I got immediately smarter. Maybe you should ask your amp's design team and see what they say instead.
Charlie

Since I recently switched from a 300 wpc amp to a 100 wpc (both 8 Ohm), I leave it on and do not turn the voulume down. My amp only runs slightly warm. BTW, since I've been leaving the amp on full time, my stereo system sounds its best at all times. All my other components have standby modes. Cheers. Craig