Hello,
There's something I am wondering about. Many people respond to my questions and provide super detailed solutions. But I can choose only one solution.
is it important/appreciated to assign solution? I think it is on stack...
As far as I know, the only impact that choosing a solution has is:
It displays a next to the post, so people know it has been answered.
It adds a link in the first post of the thread to the chosen solution.
I don't think it's bad etiquette on this forum to not select a solution (and it's certainly not against the CoC!). Doing it is just a nice way to highlight which post was helpful in resolving your issue