Time Machine Menu Bar Gray Icon
I don't recall which recent update this behavior changed (I think 10.12), but I miss the grayed out Time Machine icon in the menu bar when Time Machine automatic backups are disabled. I turn off automatic backups when I'm traveling, and the grayed-out icon was my reminder that backups were disabled.
Please bring the grayed-out icon back or give users the option.
MacBook Pro with Retina display, macOS High Sierra (10.13.1)