Active Directory, for joining an account in a network.
It is probably Home vs. Professional. Home has no AD either.
In personal experience there has been a big rise of Linux on the server and more people being forced to get used to it. Docker is pushing this along even more now. We are seeing the continued rise in osx and improvements in the Linux desktop. Moving away from windows is becoming more acceptable now, even in corporations. This will continue!
Don’t tip if you’re standing up!
There is no need for a separate sound card now, it is built in.