Right now the vertex layout is interleave, meaning data is stored like (VVVNNNCCC). It would make sense to use seperate buffers, like in (VVV) (NNN) (CCC).

Pro:

• Easier adding of new attributes / more modular approach
• More controlled binding, like only bind position buffer for shadow rendering
• Faster modification of certain buffers, like changing the vertex color on the CPU without uploading the entire mesh again

Cons:

• More binding code -> slightly worse CPU performance?
• Unkown performance implications? https://www.khronos.org/opengl/wiki/Vertex_Specification_Best_Practices puts it as GPU Vendor dependen, but could do some profiling how bad it really is.