There used to be a "too localized" close reason but it was considered obsolete and removed by Closing changes: on hold, unclear, too broad, opinion-based, off-topic reasons, bye-bye to Too Localized.
If you wish to volunteer your time to answer the question in its present Open state, then I think you should do that.
If you think it should be closed, then I think a case for voting to do so as "unclear what you are asking" is easy to justify because 800 views and no answers in more than 4 years suggests that it is not straightforward to answer, and could benefit from some editing by its asker (or any user) to make what it is asking clearer.
I think that the responsibility for questions being answered does not rest solely with their potential answerers. Whenever we ask questions, and they remain unanswered, I think we as their askers should always play a part in trying to get them answered either by continuing to try and make what is asked clearer, or by self-answering, even if that answer is just to summarize any progress made.
If the asker is experienced, and understands that they are asking a question which may have little value to the GIS community, because it is too localized to their own work, then I think they should consider self-deleting it.