[dcwca]

"Callback hell" as it is described in this article is a symptom of not understanding how to flatten your code for readability. Deep nesting is a trap in every language, it's the programmers job to know how to write readable code.

http://callbackhell.com/

[always_good]

The problem with callbacks isn't the indentation. It's that downstream dependent logic has to take place in the callback.

If you have two logical branches that share a downstream, now you have a fork with identical callbacks.

So reducing callback indentation comes at the expense of indirection. You're not changing the nesting at all. Usually just brooming stuff under the rug.