Maybe I should put this another way, and this goes out to the buyers that get angry etc if they don't get feedback for a transaction. For argument's sake, let's say eBay abolished buyer feedback.   What do buyers feel like they would miss out on?

Ebay and a few eBay-clones are the only online venues where buyers receive feedback. Most other places (eg: Amazon, all online retailers) just give them a receipt after they pay. Whilst Buyer feedback is a part of eBay's history, it'd sure solve a LOT of arguing if they just abolished it. eBay moves very slowly in making changes, but we're half way there, I guess. 😉