I want to ask a question about why some movie reviewers use a four-star rating system instead of a five-star rating system. I'm sure there must be some historical reason behind its use. But I'm not sure whether the question would be on-topic here. We have a [reception](https://movies.stackexchange.com/questions/tagged/reception "show questions tagged 'reception'") tag, but it seems to be for how a specific movie or show was reviewed, and my question is about reviews/reviewers in a more general sense.

Can I ask such a question?