e0qdk@reddthat.com 6 months ago
That requires turning every read into a write – which is slow/expensive generally. (That might not matter much for Google – who try to record everything you ever do already, basically – but it matters for everyone else.)
Also, it tends to promote spam and offensive niche content. kbin’s got a sidebar that tries to promote random low activity communities and posts, for example, and it’s almost uncanny how much crap it pushes up…