JaH Agree with with you said. And I think that's why there's no talk of replacing desktop Word or desktop Excel, because there is competition. For most people, Google Sheets, and Libre Calc are good enough and on par with the web version of Excel. But desktop Excel is a very advanced spreadsheet that isn't matched by any competitors, so Microsoft needs the power users to keep them from switching. Outlook, otoh, has no competition, even in the "good enough" realm of email programs. Thunderbird, I tried it, and it's just barely acceptable. It has really nothing in the way of productivity -- it's just an email client. So even web Outlook beats it easily. If there was an open source product that was as good at Outlook at not just email, but also calendar, scheduling, basic CRM, advanced sorting and filtering, and the massive amount of third party productivity add-ons, MS wouldn't be doing this. Outlook web add-ins are a joke -- they are just buttons to link to other websites. It's so frustrating.