Browsers add support for new JS features every year. You can use them or not, I don’t care what you do. Every web stack I’ve worked on in the last 7 years has a compile step, too, so you’re either ignorant or being intentionally obtuse. Either way it’s not like anyone should listen to you.
So what’s your point, other than communicating how upset you are over a programming language? That we should be writing websites like it’s 1999?