Yes, you can do all that in JavaScript using libraries. But in how many of your projects ARE you using all this? That's the question. And what are the steps you

Yes, you can do all that in JavaScript using libraries. But in how many of your projects ARE you using all this? That's the question. And what are the steps you have to take and the cognitive load to make sure all the libraries you're using adhere to these conventions, and all the people that contribute code to your project also use the right paradigms? When all these things are baked into your language, you're free from all the worries and cognitive load to make sure everything works as you expect it to work.