Sure, i fully agree in point that callback hell shouldn't exist but i didn't wrote that it exists in our code base, that's why i wrote about promises in my comm

Sure, i fully agree in point that callback hell shouldn't exist but i didn't wrote that it exists in our code base, that's why i wrote about promises in my comment. But i still read callback hell in a lot of packages that were created before promises started to be popular. Even some of new packages that i saw are still written in pure callback way because authors prefer that old school way of doing things.