It's getting a lot less common that people need to checkout & build code they want to run, which is probably the way some regular users might interact with it. The rest of its users are developers, and its use spans all platforms. Microsoft embraced it some time ago, as well as buying the popular github online platform that's built around the tool.
That's an odd way to put it, because git doesn't really solve the
distribution problem. It's a source control system, which roughly equates to software maintenance. Things like: change-tracking, conflict detection, branching, merging, and holding associated metadata.
Linus also likened its design to that of a filesystem.
The first line of the FAQ you linked starts:
"Git is a distributed version control system ..."
Version is a key word, as it's fundamental to source control.