[bombela]

> Of course it won't physically change the switch position, ...

But that is what we are asking for. That the switch physically moves to follow the state of the system.

I want the switches on either side of a hallway to move in sync.

[TeMPOraL]

Exactly. If we can have (or at least used to be able to) physical sliders that work as both inputs and outputs, then why no wall switches? I want my wall switches be in sync with the state of smart devices - like, if I turn off a smart light remotely via an app, I want the corresponding wall switch to physically flip.