In short, an issue needs to be considered a priority by the maintainers of the project, and with open source these priorities compete with … life. I don’t think this is much different from other open source projects. Some times issues also just gets forgotten, which I guess was the primary motivation behind your post.
Do you mind sharing what criteria you use for this?
‘Forgotten’ wasn’t a reason I had in mind. After reading several comments in some past issues, it seemed what some users requested to be prioritised, was instead left open, with some issues going back 10 years. Hence my question.
I assume this means some of these issues need a lot of resources to implement.