Each lib/frameworks has it's own pros/cons and job opportunities. Better to know when to use one of them. Use it when 👇
Angular 4: Wanna build an ERP class application. Much better integration and Full-featured framework
VueJS: Build website that concern with performance, simplicity, and easy to use
ReactJS: Build website or even crossplatform mobile apps (with React Native), production ready, care about Javascript fundamentality, and concern about size of team members (especially for startups)