What Would Be the Reasoning Behind Leaving Class D Amps On?

I may need to restate my original point. While sure, I leave on my DAC, in terms of amplifiers, no solid state amp I’ve never owned takes as long to warm up as my Class D amps. It’s not even close. My A/B amps have taken no more than an hour while D takes days. You don’t even have to play music. Just leave them on.

Good thing each monoblock idles at about 5 watts!

What's funny is how some of these conversations develop on A'gon:

Poster:  I came back home and my system sounds like crap and I don't know why, help!

Me:  Are you using class D amps?

Poster:  How did you know?

Best,

Erik

You know, Erik, I'm wondering if my NAD M22 would have sounded better if I could've figured out how to disable it's auto standby feature, where it put the amp into semi sleep.  It wasn't supposed to be that hard, but I'm no longer good with tech options. 

My Marantz Ruby is never turned off now.  

@jbhiller 

I'm not sure.  I believe NAD uses nCore, and in some cases hybrid NCore / Class H designs.  My personal experience is limited to IcePower.  I can't say it is a problem which extends any further.

Fair, Erik.  I nearly gave that amp away for a buyer friendly used price. I should've kept it and used it in a different system. It was a fine amp.  I just couldn't get it to sound right with my higher efficiency speakers.  Sounded great with the house brand PSB Imagine T2s. 

@jbhiller 

I'm not strictly objective, but unless something passes a double blind test, it's simply opinion, which can be greatly influenced by cost and appearance.