The subject is self-explanatory.
Don't you think that it would be an amazing feature when you could create for a track 2 or more different channel alternatives with different chains, plugins etc. and then pick the best? The point is that while one of the layers is active the others are offline without CPU usage.
I know well that we can do something like that in a differnt way like copy a track, than create a different plugin chain, with different tweaking etc. then mute one of them and vice versa...
But channel layers, some different channel alternatives within the framework of a track would be a lot easier and more comfortable than that.
Please, vote here
http://forum.cockos.com/project.php?issueid=5622