[Aperocky]

I feel like you're mentioning forward compatibility instead of backward compatibility. ES5 code should run fine in ES6 AFAIK, and that's the extend of backward compatibility that should ever be needed. I haven't touched node all that much, and I'm in the camp that while it's good to just write one language everywhere, javascript still exhibits many of the key features of a browser language, which makes running it locally 'unnatural'. Same with trying to get python to run in a browser, maybe we should just embrace that we need to learn more languages as that is generally the case for us software engineers.