Many of our users preference the use of inlines for conversation in regards to the referenced section of code over doing it in the top feed since even if we keep it to no more then 100 ncsl per review multiple topics on different segments can spawn and doing all that conversation in the top can cause confusion.
Because of this the code diffs can become quite large and spaced out by the inlines.
In this case a way to hide/collapse the inlines would be very useful especially if you just want to look over the code without having to scroll through all the inline replies.
In a perfect world the inlines would actually be reference points(little icon with a number at the center) and when clicked would display either a pop-up of the discussions or a feed off to the left similar to how the file tree is presented and could be made as a config option but I would assume that would take a decent bit of work to do.