Are there any negative side-effects of blocking svchost.exe from making outbound connections?

Background : I would like to definitely prevent Windows 10 from ever updating unless I manually allow it to. I thought of the idea of using the firewall to block outbound connections from the Windows Update service, thus preventing it from downloading an update. However, I've found that the Windows Update service is bundled into this svchost.exe process which apparently has other functionality as well. My question : What potential negative side-effects might there be from blocking all outbound connections from svchost.exe? What else does svchost.exe need to connect to the internet for? Is ther

Question by Brionius on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.