One of the biggest obstacles for adoption of Angular in the enterprise is technical, but not of the nature that one could expect.
It's hard to convince our boss to use Angular in our next project if we can't even install it in our own PC ;-) ! We would probably want to do an early demo or prototype to get things started.
But many companies have corporate proxies and security policies that make tools like npm hard to try out for the first time.
One of the biggest features of AngularJs is that it does not come necessarily with all the tooling ecosystem, and can be used via simple script tags. Angular 2 and beyond in principle can also, but we really want to use it together with Typescript, the Angular CLI, Webpack and all the tooling ecosystem.