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> Not to mention, there isn't a whole lot of software left that doesn't need at least some networking for its 'primary' functionality.
Case in point, Microsoft Office has no good reason to be aware of the existence of the internet. Its job is to open, view, edit, and save local files. No one I know uses any of the cloud crap they added in the latest versions. The only use case when networking might be needed in Word/Excel/Powerpoint — and even then, it's most probably handled by a system service — is printing to a networked printer.
(when working with a file stored on a remote server, shared over SMB or something similar, that's definitely handled by the system and appears as a local file to applications, albeit on a very slow disk)