I would find it useful to be able to rename Extensions such as Comments or File Uploads to more clearly indicate what they’re to be used for. With comments, for example, on a Contact it might make more sense to rename this to “interactions” and to use it to record every time you interacted with a contact (e.g. call, email, etc.). With other things it might be useful to rename it “Updates”. The differences may seem minor, but I think it would enhance clarity. Especially if you imagine interacting with the system as a non-admin user, someone who has no idea about how the back-end works, or what “extensions” are.
Basically I want to use Comment as a universal stand-in for sequential, dated updates to a variety of Types and each one may have different terminology or concept for what an “update” really is.