Using New Outlook on Windows for personal email, calendar, and contact management
I am just wondering why rolling out something that with useful function missing, and telling people that it is not implemented.
Because it is not actually rolling out yet. It is currently offered as an Opt-In (meaning: It is not the default yet; you decide to use it or not) for Classic Outlook which allows you to see the current development state. You can use it and it is supported but many of the features are still in development or on a backlog, so it is anything but ready.
Also, see my other replies within this thread for more details about the status of New Outlook when compared to Classic Outlook.