Stubborn little myth, that "WinSxS is almost all hardlinks" thing...it isn't. Most of it is actual files, and these files are actual copies of real, live system/app files.
If they weren't, then how would one ever be able to reinstall deleted files?
Where would sfc /scannow get missing/corrupted files from in order to replace them if not from winsxs?
And how would anyone be able to upgrade their Windows edition in-place without, say, a huge download?