While I do know React well enough, when trying to work with local content I had to follow a tutorial that asked me:
1. To install 2 plugins 2. To copy-paste 3 different chunks of boilerplate code (configuration, the code that maps filesystem data into some kind of representation — maybe using GraphQL already, I’m not sure — and lastly the GraphQL queries to retrieve that data). 3. To personalize this boilerplate code, which requires me to learn GraphQL.
Other tools can do similar work without plugins, without having to learn a second language (GraphQL) separate from the core language that the tool is using (JavaScript), and without having to write code to feed content into a in-program representation yourself.
It could be that all this overhead is worthwhile because it enables you to do complex things. But from what I’ve read I wasn’t even sure that Gatsby could achieve my use case without me duplicating my information architecture as “feed content to the in-program representation” code, and I didn’t want to risk spending a second day only to find out that it couldn’t. (Your comments about tree navigation, as well as some of the GitHub issues I’ve read, suggest I was right to bail out.)
My actual takeaway is that Gatsby might be a good fit if you already know React and GraphQL (or already wanted to spend time learning those), and are working with remote content from a headless CMS and some other sources. But for local content only, unless you already know Gatsby or want to use that project to learn it, it’s needlessly complex and overkill.