Stallman on GCC, LLVM, and copyleft

Looks like you're conflating "core" and "differentiate" there. SMB is a core feature for any kind of NAS storage box. Now, with Samba out there, it may be hard for vendors to differentiate themselves on it, so they have to find some other feature that differentiates them (which may also be a core, required feature for a NAS to have, but also need not be).