This is longer on my mind but now I experienced it also with my question.
Imagine there is a question which has real answer which can be found after investigation (whether it is more or less realistic to do), but no one from the audience knows it. Based on several opinions (without additional questions and further research) the question is marked as opinion based.
Why network speed changes rather in "steps" than totally randomly?
Is the above one really opinion-based question? For example, if developer of mentioned measurement app will read the question today and then describes and explains the behavior of measurement, then it is clear that the question is not opinion-based, but has its true and reasonable answer. (The app-specific behavior was partially identified long time before closing.)
But community here will not wait for hypothetical case that the app developer finds the question... Shouldn't such a question simply remain open, waiting for the right answer (even forever) instead of being labeled as opinion based? This can be dangerous precedens, because if someone has tricky formatting issue in MS Word and there is more opinions, but no right answer, will the question also be labeled as opinion-based?
As an user who is asking the question, may I view such a question as legitimate (hoping that someone who knows the answer finds it) yet before posting?