Go for Ember:
- Proven tech
- No licensing issues
- Solid community
- Community driven, no company calling the shots
I dont see much of this problem, including myself as one of these just hired jr devs.
I need a framework where any experienced JavaScript developer can pick up the project and deliver working product in a week. With Ember/Angular/React+Redux, I have to hunt for a developer that specializes in that particular framework. With Vue, the hiring pool is vastly larger.