Hi guys, I did some testing too with W2016 GUI boxes too and I experienced there is huge difference between the clean install update and when you work with updates aplied after Jan 2019.
As I have tested it, it took about 6 hours to make a first update with .iso image MLF_X21-3035 downloaded from Microsoft and used for a clean install. But since applied patches in the end of Jan it's just a matter of minutes to update the install and it's very fast (Feb 2019 updates took nearly 7mins to apply and WinDef daily updates are just a matter of 1-2 mins without restart - using sconfig or UI it doesnt matter - i am testing it behind FW + proxy and other HTTP protections on the way).
Now I am working on W2019 Core and UI tests so hopefully will get some numbers too.
2 EFD - having no internet connection at the time of Azure & AWS and hybrid infrastructure? Sorry but its 21st century and advanced firewalling is the solution for today not to be closed in a bunker. And when I compare Linux machines, clean installs, updates with W2016/2019 it's like a heaven and ****. In case of Linux it's transparent, all infos & progress provided to admins every second and all update process takes a few minutes. In case of W2016 I had been working on clean installs this weekend and I saw rolling icon & don't turn of you computer for many hours. However W2016 is fast and stable system but WU it's something horrible. And SCCM has nothing to do with it because WU is internal and not the orchestration around it and SCCM. There can be just improvement like using WSUS and some internal issues W10/W2016 have with searching for online update MS services and downloading http .cab crazy stuff. The new WU is a replacement of a previoud Update services that W10/W2016 provide and this is the crazy stuff that Microsoft introduced with W10.
We are moving from Win2012 to 2016 and the experience is terrible with Updates. It takes hours to update and its many times slower when compared with 2008/2012. And even it is unreliable. Sometimes Updates are broken without any info. Upgrading domain controllers to 2016 becomes a nightmare.
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