After more than a month of testing with Windows Insiders in the Release Preview ring, the Windows 10 May 2019 Update was finally made available to the general public on Tuesday. We already have a pretty good idea of what's new in the update and, despite the extensive testing, Microsoft also published the known issues with this release.
Now, though, we're also learning what's being removed or deprecated starting with this version. There aren't a ton of things being killed off, but some well-known features such as Windows To Go are no longer being developed, and may be removed in a future release.
Starting with what's already been removed, there's the sync capability of the built-in messaging app. The app was already nearly useless since the death of Windows 10 Mobile, but now it can't sync any messages from your phone anymore, so there's even less reason to use it. Of course, you can use the Your Phone app to sync that content now, so not much of a loss.
The XDDM-based remote display driver, which comes from as far back as Windows 2000, is also planned for removal in an upcoming release. Software makers that still rely on it will need to start considering making the switch to the WDDM model in order to keep working as intended.
There are also a few features that are no longer being developed but aren't necessarily being removed for now. One such feature is roaming taskbar settings, which Microsoft says it's planning to disable altogether in a future release. Microsoft is also preparing to drop support for Wi-Fi networks still using WEP and TKIP security, with a warning message being displayed starting with this release. Support will be fully removed in a forthcoming update.
Windows To Go, which lets you run a Windows workspace off of an external drive connected to your PC, is also no longer being developed. Microsoft says it doesn't support feature updates, and so users can't stay on current software, plus it requires a specific kind of USB connection that is not commonly supported anymore.
Lastly, Microsoft is deprecating the Print 3D app, so you'll need to install the 3D Builder app from the Microsoft Store if you want to print 3D objects. Interestingly, Microsoft removed the 3D Builder app from Windows 10 in Windows 10 version 1709, recommending that users use Print 3D instead.