New Outlook has actually been decent for me. It started out pretty bad and slowly got better. The big decider will be if they continue that path or stop early i

New Outlook has actually been decent for me. It started out pretty bad and slowly got better. The big decider will be if they continue that path or stop early in the next two years, not whether or not the app is exactly the old one. E.g. COM add-ins are out but cross platform (what will be browser/phone/web and Windows desktop) compatible extensions will be pushed instead. Some will miss the COM addins after the end of the decade but most will be really glad it's not just a legacy windows desktop that has the addin they need at that point.