In most Office apps you can make this Alt + 1 by setting "Paste As Plain Text" as position 1 in the Quick Access Toolbar (the small list of icons in the top lef

In most Office apps you can make this Alt + 1 by setting "Paste As Plain Text" as position 1 in the Quick Access Toolbar (the small list of icons in the top left of the app). But yes, would love for this to be a universal Windows command.