Nodes vs OSL (kinda)

Can nodes and OSL be used to create the same materials, or is there something you can do with OSL that isnt possible with only nodes?

Nodes give you a lot of possibilities, but you can’t do everything with nodes only.

Check out this blog for example, you can’t do most of them with Nodes only.
In OSL you can create new, unique textures, and you iterate over data (“for” loops as an example) and that’s not possible with Nodes.