A family of Microsoft word processing software products for creating web, email, and print documents.
I can assure you that Word has never saved printer settings with the document--not in any version, and I've used every version since Word 2.0 for Windows (except Word 2000). Publisher does this, and I agree it's handy, but I don't really expect ever to see it in Word.
The rationale usually offered is that Office is often used on a network, and there's no guarantee that a specific printer will be available. Similarly, if a Word document is shared with someone on a different system/network, the default/available printers will be different. If a document insisted on being printed on a printer that was not available on a given system, users would be frustrated by error messages. The reason Publisher can get away with linking to a specific printer would be that theoretically Publisher is not designed to be used on a network and that Publisher publications are less often shared (just because fewer users have Publisher, and they're often sent to commercial printers in another format).
You can argue with all this reasoning, but that is what we have been told by Microsoft.