> I feel like this is very true for topics that are extremely shallow, like programming language frameworks.

I'd argue that the framework in question matters a lot. If you could link me to a blog post to get me up and running on Rails, I'd ask for a link (seriously, would be interested).

For vast frameworks like that, I think a book could be very beneficial. "Getting Started" sections can focus too much on streamlined starts when (at least personally) I'd love to dive into how the ORM works for more complex joins instead of just a single "get all" query for a single table.