Yes, I agree with you, that it is very strange, that the evolution dac does not provide trigger out.
And as the evolution sta does not react to a remote control unit as the amg sta did, we have to find another way to turn it on.
Of course you may use the manual power on/off, or maybe use another device to do the job.
My system is the evolution sta and dac, amg pra and stream-9. And actually, the stream-9 has trigger out capability!
And the stream-9 has a remote control unit. And also a very good streamer.
The evolution sta is a very good amp, and the evolution dac is an extremely good dac, for the first time I find digitally based music played through the evolution dac sounds natural and more alive (analog), so I will recommend the evolution dac as the obvious partner to the evolution sta, even it does not provide trigger out.