I wouldn't even put AngularJS as it's only used on legacy/Enterprise projects. New projects are not being built with it anymore (I hope so!).
We had to migrate our codebase from AngularJS to angular 7, now 8, and it took us a few months. It was an interesting experience, but not a fun one.
Yes, it's a good point, but I'm afraid it's like devs dream. Still, I see old, happy AngularJS or even jQuery in big enterprise projects and companies look for people with that skill. What is funnier, most of these projects are the best paid.
Oh yeah, once you know a skill that most people don't learn anymore you are a rare beast and there are plenty of large Enterprise software that it's too painful and expensive to migrate. I also work on an Enterprise SaaS, it's a large codebase but not huge and it still took us 3/4 months to migrate to Angular 7
I think it's fair that he included them. Following that logic, he would not have included Backbone, Ember, and jQuery as they are all slowly but surely losing adoption as time goes on.
Also, while AngularJS might be considered legacy by fans of Angular (2-8), let's remind ourselves that Angular 2 changed so much at a fundamental level that it might as well be considered another framework entirely. Vue.js is far more of an Angular continuation than Angular 2 ever was.
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