Thanks, Zachariah, for the info.
As my Lionel engines are currently being run through Bluetooth, the app doesn’t seem to have any power down feature that I can see. I’m not ruling a Legacy system down the road, but at the moment I waiting for the WTIU as a first step to a full-featured system. And a vast majority of my engines are DCS.
So then using the toggle switches and powering down sidings and powering them up again won’t harm anything even though it sends all the power back to the trains at once? Maybe I am just being paranoid.