Feature prioritization is based on multiple principles. Basic are aligning to company vision, product strategy, and customer profile. For example, if you’re targeted to small businesses or home offices doing SAP integration request shouldn’t be in your first place.
But what share feature requests take in a product backlog? An answer like “it is full of customers' requests” isn’t correct. It seems strange but true.
If you’re not happy to read long texts the advice is “you should not give attention to customers' requests if your product is mature”.