Switch node in Shader editor

The idea came from other DCC packages and renderers. Blender offers pretty decent random color variations for copied/instanced objects, although it turned out to me it is not so easy to implement switching textures with the current given nodes. Sometimes I need variations of textures across different objects and it become messy building the graph.

My proposal is to implement the special-purpose node which should have dynamic inputs for textures and one input ranged [0..1] as a switch between them. Basically, the switch criteria should be just a random object id.

As a proof of concept, I wrote simple OSL shader with this functionality and it works fine! The only drawback is that OSL isn't working with GPU in Blender.