"Facebook represents a dangerous deviation in media history. Once upon a time, elites proudly viewed themselves as gatekeepers. They could be sycophantic to power and snobbish, but they also felt duty-bound to elevate the standards of society and readers. Executives of Silicon Valley regard gatekeeping as the stodgy enemy of innovation — they see themselves as more neutral, scientific and responsive to the market than the elites they replaced — a perspective that obscures their own power and responsibilities"
"The scariest part: over 90% of my feed’s subscribers use Google Reader. What happens when Google Reader dies?"
but I suspect the hardest part is the client app for readers, which works in a way analogous to an RSS reader or email client, but would have to support a new format and would be optimized for clean reading and subsequent discovery, rather than the three-pane model which has dominated those apps for the last decade or two