What the documentation for Elixir and its big libraries (Ecto and Phoenix) lack in quantity of documentation, they exceedingly make up for in quality of documentation. Who needs a bunch of garbage blog posts about how to do xyz, when the official docs painstakingly lay out not only what you need to know, but also present it in a readable and discoverable way?
In my experience, the documentation is great for most of the major libraries and the common path.
Once you get away from those things get sparse. Several really common libraries have glaring omissions (or entirely missing) module docs, and others just barely cover the common web use case.
It’s not uncommon for me to have to open the source code to try and understand what some function actually does.
Elixir is still my language of choice and has a better docs ecosystem than most languages but the community demonstrates a bit of a blind spot also.
I generally agree, but to play devil's advocate: some people learn better by example, and having thousands of (admittedly low quality) blog posts out there makes it more likely that someone will have done something very similar to what you're trying to do.
