The SAC releases preview features that will come to the slower-moving LTSC in the future, and many organizations will run them side by side. This shouldn't be confusing to server admins, since the two channels are designed for different roles. The delay to the Windrelease caused a hiccup in the Windows Server 2019 launch, which means that the Long Term Support Channel (LTSC) version of Windows Server is becoming available to organizations alongside the first preview of the next Semi Annual Channel (SAC).
