[democracy]

And many projects/people don't care about not supporting anything but the latest chrome, so yes, for them it's a legacy.

[niclo]

Most if not all the modern frameworks/projects use Babel to compile modern Javascript to the es5 standard from 2009. I guess 11 years of browser backwards compatibility are enough, or should we downgrade and support IE 6 ?

[democracy]

its not about js compatibility it is more about platform / browser specific glitches