Yes, this. You have to learn all the abstractions in a language, and the advantage of "batteries included" languages are that the abstractions are (largely) the

Yes, this. You have to learn all the abstractions in a language, and the advantage of "batteries included" languages are that the abstractions are (largely) the same in everyone's code, aiding maintainability and re-use. On the other hand, if you build everything yourself, it might be better optimized to your use case, but you'll be the only person who's easily able to use the abstractions.