Angular 1 is, but Angular 2+ is not at all. Angular's CLI is Webpack based, and leverages NPM for package management.
As for build systems vs. script includes... I think Vue is probably being used in a lot more hobby projects than npm downloads would seem to indicate...but using a build system is a stronger indicator of a professional web app and pretty much necessary for any non-trivial project.
As for build systems vs. script includes... I think Vue is probably being used in a lot more hobby projects than npm downloads would seem to indicate...but using a build system is a stronger indicator of a professional web app and pretty much necessary for any non-trivial project.