Hacker News Reader

That is more indicative of Google’s culture and lack of focus than the viability of the idea. With the death of Google Reader, plenty of RSS aggregators popped up and are still kicking.

There can be more than one pizza restaurant.

Wow! I had no clue that this ever existed. I guess it was DOA given its short life-span.

And way before that, there was this: https://en.wikipedia.org/wiki/Google_Answers