Glaring gap in ability to customize Salesforce

I bet it's starting to sound like I don't like Salesforce. The truth is I think it's fantastic, which makes the problems I write about that much more frustrating.

So, speaking of frustrating: you can't add a related list to the opportunity line item object. I have complained about this through the IdeaExchange and got a whopping one vote (every vote is worth 10 points and every idea starts off with 10 points). I have a theory about why this got no love, though. Try going to the IdeaExchange and searching for my idea. I've looked for it using every keyword combination I can think of, and always end up with 70+ pages of results.

So, for all I know, lots of other duplicate ideas like mine exist out there, but they're buried admist lots of other unrelated ideas. I just can't believe that only one other person doesn't have a need to add a related list to the opportunity line item object. This is, by the one, one of maybe 3 total objects (case comments comes to mind as another area - anyone know of others?) in the entire system that can't have related lists added to it. The inability to add objects here has cost us thousands of dollars in customization work to find workarounds for this obnoxious bug.