Too Long; Didn't Read
JavaScript is the third most used language in the world with java and python above it. The language will always have a historical cruft because web standards strive for 100% backward compatibility with every piece of code ever written for the web since it began. JavaScript has lots of wonderful updates and modern language features. The syntax is beautiful and it reads like a book. Many languages will come and go but JavaScript will keep ongoing and maintain it’s beauty. The FrontEnd should never be your source of truth. The frontEnd manages state while the backEnd gives and takes your data.