I read all of the documentation for the service that I operate--per my other comment (https://news.ycombinator.com/item?id=29973282), often times things aren't well-documented and it's crucial to be able to look at the source code to figure out what something does (e.g., how is a configuration parameter used? what are its valid permutations?); however, when the source code is obscured by gratuitous complexity then it imposes a high cost on the user and in the case of DI frameworks, that gratuitous complexity comes with no discernible benefit (a car offers me something of value to justify its learning curve). Personally I'm of the opinion that a person shouldn't have to be a seasoned Java developer to use so many tools that are implemented in Java (or any other language, for that matter).