Visibility Tracks

Is there anything like visibility tracks in Notch? I know adjusting the timeline works for in/out points but if you want to constantly turn things on/off what’s the best solution? Currently I’m using things like select child nodes to cycle cameras or swap geo. It would be nice if you could add a visibility track to any node or if visibility was built in to something like a null that propagates down the hierarchy.

There is a Execute Children which allows you to disable node at runtime
I agree it would be nice to have enable/disable mode which is built in node.

Most (/all?) rendering nodes have a “Visibility” parameter which can be keyed or have modifiers hooked.
Execute Child Nodes can be used to kill a whole branch.

Cloner doesn’t have visibility parameter. What happen if you change visibility of the cloner’s child, does it calculate duplication anyway or not?