Microsoft revealed today that Office 2019 will ship in the second half of 2018, and will run exclusively on Windows 10 [ghacks.net].
Microsoft's General Manager for Windows, Bernardo Caldas, and General Manager for Office, Jared Spataro announced [microsoft.com] changes to Office and Windows servicing and support today.
[...] Office 2019 applications will only be supported on a limited number of Windows client and server operating system versions. In particular, Office 2019 will only be supported on the following systems:
- Any supported Windows 10 SAC (Semi-Annual Channel) release.
- Windows 10 Enterprise Long Term Servicing Channel 2018.
- The next Long Term Servicing Channel release of Windows Server.
Unless I'm misreading Microsoft's announcement, Office 2019 won't be available for Windows 8.1 or Windows 7, or older Server versions.
[...] The company plans to support Office 2019 for five years of mainstream support and about two years of extended support.
[...] Office 2019 support will end around the same time that Office 2016 ends. It is unclear why Microsoft made the decision; one explanation is that the company plans to move all-in in regards to Office 365 and Office in the cloud and that 2025 may be the year Microsoft might make that switch.