Social news aggregator founded in 2004 by Kevin Rose, which at its 2008 peak was the dominant front page of the internet — then collapsed in 2010 after a redesign (v4) that ignored its community. The canonical Silicon Valley cautionary tale about how a single bad product decision, shipped over user objections, can evaporate a decade of network effects in weeks. For Karthik: a reminder that with FeatureOS customers, the feedback loop isn't optional — it's the product.