Using New Outlook on Windows for personal email, calendar, and contact management
Then what's the blimming point in bringing out the New Outlook if it's not "feature complete"? Besides, this is nothing NEW! A new version is suppose to be "better". Hopefully, I will have retired by 2029 and not have to bother with this.
Well, granted, there definitely are new features and a new approach of doing things in New Outlook. It was similar when Teams was remade on a new platform and then they called it New Teams for a long time until the original Teams got retired.
There is a long transition time for businesses as well and making it available early gives everybody the opportunity to try it out at their own pace and when they are ready. Not everybody relies on all features and for some a small feature can be crucial to their workflow. Personally, I'm still waiting on proper Search Folder support before giving it a go again as my daily client.
But mainly "New" is the modern marketing way of not having to call it Preview or Beta 😅
It is also a clever (but still confusing!) way to circumvent the issue to have New Outlook already be the replacement of the Windows Mail, Calendar, and Contacts app without having the "Preview" or "Beta" label on it. Compared to that, it is pretty much feature complete, there is a lot of feature parity and a lot of new features as well. So with that in mind, the moniker fits as a replacement for those apps. Compared to Classic Outlook... not so much (and that is being polite 😇).
There are also plenty of new business users without the Classic Outlook legacy where New Outlook completely (or at least mostly) fulfills their need. They have no intention to start with Classic Outlook or make themselves depended on legacy features such as COM Add-Ins, custom forms, and VBA (all of which will not be coming to New Outlook!). Having the Preview or Beta label then on production software would be confusing too and gives out the wrong signal.
New Outlook is GA (General Available) for business now, meaning it is fully supported throughout all business support channels from Microsoft. GA for New Outlook does not refer to feature parity with Classic Outlook nor that Classic Outlook is no longer supported.
Hopefully this cleared up a few things for some 😉