That's to say, every update will increase the size of this folder.
When your computer updates, it will keep both new Windows component and old component in the WinSxS. And the component files are just links to the files contained in the WinSxS folder. That's because the WinSxS folder contains all system components of your computer. Many users reports that I don't why the Win SxS folder get too big? When you find that your c drive is in low disk space, you will go to examine the size of the C:/ Windows folder and then you may find the WinSxS folder use a lot of space.