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There are multiple questions/aspects in your posts, so I will go one by one:

> Stack Overflow which answers many questions

While this is true, for many questions SO has an important drawback. If the question is old enough it might have a lot of outdated answers. By outdated I mean anything that makes the answer suboptimal (more code, slower or containing anti-patterns) or even broken (the framework evolved enough to have breaking changes for the example).

Even if one asks the exact same question here, Codidact might provide a better answer simply because one does not have to scroll a lot to get to the most appropriate answer. 

> there are online tutorials and courses on YouTube and many other platforms that may solve your problem

Q&A sites like StackOverflow had an immense success because online tutorials typically do not expose information in an easy to find way. Tutorials might very good at providing in depth information about a topic, but fail to help one with a specific programming issue which can be related to many aspects such as using multiple technologies together, the setup etc.

> **How much research effort is expected from the asker by the community?**

Personally, I expect the asker to provide **anything that shows at least some personal effort regardless of its nature**. Examples:

- relevant code along with a focused question about why something fails with a clear error message
- implementation attempt using some online resource, but asking about why some aspect was implemented in a certain way

Let us not forget that asking good questions is quite hard. If the asker takes the time to provide most of the meaningful details for a programming problem to be answerable, this is already an important effort.