More curious than a real question- remote trigger? Anyone use it?

So my amp can be switched on one of two way. Pushing the power button on the front or by connecting a short cable to the preamp and then using the preamp's remote to trigger the amp on.

I am sure other amps can be remotely turned on as well. Just wondering if anyone actually uses the remote trigger feature. I don't, but I tried it for a day or two for sh*ts and giggles. 

I have a straight forward 2 channel system. Perhaps if I were running a bank of amps, I could see the usefulness.