Basically https://github.com/zloirock/core-js runs the majority of the web, yet no one gives a shit about the single person that maintains the library for free, and is also stuck in Russia. Guy is perhaps the most experienced JavaScript developer alive, ensuring that you can use new features consistently across all browsers. The library requires constant maintenance, so dependents such as babel.js, who rely on core-js for core functionality, are dead when he decides to drop it. TC39 ignores him, even though people from babel get a say, even though babel is essentially a fancy wrapper around core-js. Being a maintainer truly is a thankless job.