[jakear]

The question is whether the missing feature could be reasonably inferred to be present based on competing products or the product’s description.

Let’s say I buy a camera. It takes photos well enough, but I soon learn that it can only transfer the photos to my computer over WiFi or the cloud. This is terribly slow and not in-line with what I’d expect from a camera, so I leave a 3 star review saying that while it works fine, not being able to transfer photos quickly means I cannot recommend it, and that if this feature were added in a software update I’d rate it 5 stars.

Imo this is totally reasonable and a review whose contribution to the average rating I would value much more than “5 stars, the photos are good. I’m upset however that I can’t transfer them quickly, but oh well that’s a missing feature and I’m not allowed to complain about missing features in a way that affects the star rating because that would make the people who didn’t implant them upset”

On the other hand if I leave a review for the camera saying “3 stars, this did not come with a exposure and zoom configuration that let me capture the andromeda galaxy, please add and I’ll make 5 stars”, that’s a whole different story.