Microsoft, are you running low on hosting space, or something?
I mean, how does one of worlds largest software corporations, handing people OneDrive accounts left and right, not to mention all the other digital waste they're busily involved with, lack storage space for some valuable archive pertaining to use of one of the world's most popular OS and associated software suites? Someone should just forbid them to "retire" content, especially if posted by actual people.
Fortunately, The Wayback Machine / Internet Archive works overtime to take upon themselves the responsibility I think would have been best left to Microsoft.