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Since they are introduced, they have been updated regularly, but now they are no longer updated.
Using UWP means users can use the same app core on desktop Windows and Windows 10 Mobile.
However, with less and less attention to Windows 10 Mobile, this compatibility is no longer a priority.
iOS and Android are still the focus of their efforts but the mobile platform has been abandoned.
On the one hand, the decision is not surprising.
The traditional Win32 desktop version of Office is the most powerful version of the app and the definitive.
In fact, businesses always depend on this version, thus, Microsoft can only continue to develop it.
Besides, as part of Office 365, this desktop version is considered the newest feature.
In this case, it is superfluous to develop a second version of Office.
On the other hand, this move is not without cost.
And Microsoft has been trying to let the third-party developers build UWP apps.
These apps have some desirable features: they are safer and can play better with power management capabilities.
Besides, some parts of the UWP APIs are more modern.
In addition, the UWP apps can play much better with high-resolution screens.
However, these factors have limited UWPs appeal.
As a result, developers also decide to stick with Win32.
From these two aspects, you know why Microsoft suspends development of touch-friendly Office apps for Windows.
When referring to Office, it is the desktop version that is far and away the most popular.
Thus, it makes sense to reprioritize.
As Web standard continues to evolve, progressive Web applications will make more sense for Microsofts long-term strategy.
