I suspect this search path/save textures thing is something I don’t understand fully yet, similar to the block manager… it doesn’t intuitively feel like a system the rest of the industry uses when it comes to linking/embedding files. 
We’ll see when the PDM is actually up and running if it throws errors when Rhino starts spamming folders… wonder what Rhino will do if it doesn’t get folder write access (which might actually be a thing).