First of all Typescript, is now more mainstream JS dialect than vanilla-js itself and, honestly, the only one i care about. And i thought it's kind of obvious

First of all Typescript, is now more mainstream JS dialect than vanilla-js itself and, honestly, the only one i care about. And i thought it's kind of obvious for anyone, that until *JS* proposals are staged far enough - Javascript won't have those features too. There is a good reason why TS waits for the stage 3.