I would not call it WYSIWYG. Send it to a friend with a slightly different version of Office or Windows, or without the same fonts installed, or with a different locale, or a different printer, and it stops being WYSIWYG.
I'll grant you the version difference, but otherwise I strongly disagree. Font issue doesn't exist if you use standard fonts and is solvable in general by ticking the "embed fonts" checkbox. You're better off than with SaaS versions, which offer you a very small selection of fonts. With printers, it's actually MS Office that can paper over the differences between models and drivers; you're better off by default.
With the set of available feature, Word is as close to WYSIWYG as you can possibly get.
With the set of available feature, Word is as close to WYSIWYG as you can possibly get.