Ask HN: The C4 model, any reviews, opinions or alternatives?

I am learning how to document software architectures and I stumbled upon the C4 model[1], in my humble opinion it is pretty straight forward and I like the maps analogy.

I want to know opinions on this, any pain points while using this and I want to know what is your experience and if there are any alternatives.

[1] https://c4model.com/