Leave solid state amps on? Or turn off everytime?

As far as I know the only perishable component inside is electrolytic cap. The most influential factor on the life of electrolytic cap is temperature. Every 10deg Celsius increase in temperature means cutting life of capacitor by half. 10 degrees Celsius is about luke warm temperature inside of your cool running Icepower (capacitor also heats up from the ripple current thru its ESR)

I have similar amp and turn it off at night and back on when I am back from work. That way for the time I'm sleeping or are not at home amp is cooler and protected from spikes in power line.

For class a SS or tube gear turn off heats up fast no need to leave on. But some gears designed to be left on. I find turning these off requires a day or so to come back up. But if your kit heats up fast why leave it on?

My Pass Labs XA100.5 manual states "when not actually intending to play music the amplifier should be left in standby mode, where it draws only a few watts of bias on the output stage." I turn my amps on (via front switch)about an hour before I plan to listen to music.

Tvad - Class A amps consumes about 8x rated output power per channel. Leaving on 100W class A amp will waste 1600W of power. I don't even leave on my class D amp because I don't see any good reason for it. It doesn't take long to warm up the amp - maybe 30 min. max and keeping it powered down extends the life of the amp (in my opinion).