Leave power amp on or off.

I have an older Rotel 5 channel power amp that I would like to start using with my living room HT system. But, the power amp does not have a trigger function to turn it on or off with the avr. And seeing how the family uses this room a lot for TV, movies, gaming. I know it will be a hassle and issue for them to turn the amp on and off manually each time.

Anyone here leave their amp on constantly?

Any issues or problems with leaving an older amp on all the time?

Any other solutions that I'm overlooking?

Thanks.