Please do not stop here Nir_Froimovici and teams.
As a next step it would be great to bring driver and firmware update support, product categories to Azure Update Manager. Also 3rd party update support, and then a kind like Arc gateway to provide disconnected scenarios / DMZ.
I might have a special opinion but I much appreciate this news. Being a long term admin and later consultant with a specialty on Windows Client, Windows Server and also Patchmanagement via WSUS, this decision makes much sense to me, knowing about all the limitations and issues of WSUS, leaving alone Windows internal database.
It testifies what we all felt about WSUS for the past decade, doesn't it?
WSUS became a growing patchwork solution to deploy, admininistrate and optimize, to an unacceptable state without ajtek WAM, till today.
Here is a blogpost of mine to learn more about deprecation in general and how to deal with it.