Microsoftoften tests new features with itsWindowsInsider builds.
Thank goodness, although the company didnt guarantee that the feature wont show up in the future.
There are better ways for Microsoft to keep its users updated.

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And absolutely nobody wants that.
It shouldnt be surprising though.

Before the current hullabaloo over ads in File Explorer, Microsoftplaced ads in Windows 8 apps.
Then it placedads in the Windows 10 Start Menu.
And Microsoft has actuallyplaced ads in the File Explorerbefore, so even this isnt totally new.
But there are better ways of keeping users informed.
For example, the company already has a tips Widget loaded into your Widgets pane by default.
It has some useful tips for everyday users, and the company could promote more of its stuff there.
PCs are supposed to be, you knowpersonal; ads strewn about in random places are anything but.