This is an experimental switch that disconnects itself completely, from the input not currently in use. The reason I made this was because I was finding that very large nuke files got faster if you completely disconnected portions of the node tree. A normal switch (at least in v12 or earlier) doesn’t appear to completely bypass what is upstream, for whatever reason… so the MagicSwitch was created to test that theory. In practice I have found it keeps my large scripts much lighter, while still providing the same benefits as a normal switch node. You can read more about this node here

I have been using this without issue for a few months now, but please keep in mind this is still experimental and not fully pipeline tested.