See: https://meta.stackoverflow.com/questions/384711 https://meta.stackoverflow.com/questions/254697 https://meta.stackoverflow.com/questions/385343 https://meta.stackoverflow.com/questions/426205

Not to dismiss you - but it's important to understand what the standard is for "duplication". This has changed over the years because the original (very narrow) interpretation turned out to be unviable - it doesn't scale. (And "it doesn't scale" is a big part of why Stack Overflow was created - where "it" is the traditional discussion forum model.)

>but it has been a while that I found the answer I was looking for on SO.

Because your search query is equally suited to find a bunch of garbage questions that should have been closed (and then deleted when they weren't improved) - often ones that are about something completely different, but click-bait because of the words in the title (often a result of OP completely misidentifying the problem and not producing a proper MRE).

>asking a meaningful question takes effort

It does. In fact, when I've written self-answered Q&A to share knowledge, I've often found the question harder than the answer.

The reputation system was very poorly conceived. It incentivizes terrible behaviours, while the best results will come from intrinsic motivation anyway. (Plus it carries the implicit assumption that answering questions demonstrates an understanding of site policy, when the opposite is often true: https://meta.stackoverflow.com/questions/357021 )

> my idea that the question is meaningful, or if it will be marked as a duplicate to some similar issue

Duplicates are not inherently bad. They help others find the original, and the duplicate count statistics help identify important questions and topics. Furthermore, it's 100% in keeping with policy to close something as a duplicate of a newer question (https://meta.stackoverflow.com/questions/404535 https://meta.stackoverflow.com/questions/258697 ). If you ask something well, and get a good answer, and then someone notices that it was asked before, your version is likely to stand instead. (And the target for a duplicate closure must have an accepted or upvoted answer.)