Can you leave class D amps on and not ever turn them off?

Thanks for all the responses.  
They are a little mixed.
The concensus seems to be to leave them on.
I've in the past always turned them on and off, and have had trouble with one balking at startup.

FWIW, the BEl Canto ref1000m amps draw a lot of current when powered up.    If I power both up at exactly the same time, my circuit breaker will break.   Once on though there is never an issue.

So a major power draw event like that is likely best kept to a minimum and is an indicator to me that its best to leave them on if possible.

My Class D Lyngdorf stays on all the time and sounds much better this way. Big difference. I always leave it on unless I am out of town for a week. At least with my amp there is a night and day difference. One hour did not do it. I have had the same experience with other SS amps. 

Regarding sound quality when leaving on versus turning off,   I suspect leaving it on at it should be only helps but have not been dissapointed either to-date after firing it up cold.

Can you leave class D amps on and not ever turn them off?

Yes.