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It hasn't been discontinued, and some Labs have been promoted to supported features (e.g. "Undo send".) And I always turn on the "Unread message icon" feature,
by nathan_f77 9y ago
It hasn't been discontinued, and some Labs have been promoted to supported features (e.g. "Undo send".) And I always turn on the "Unread message icon" feature, which is still in Labs.
If you are using G Suite, you might need to ask your administrator to enable Labs.