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Re:Ask HN: What tech were you convinced would take the world... by Al-Khwarizmi on Friday November 17, 2017 @04:34AM (#15720520)
Instagram.

Sharing pictures and comenting on them, like Fotolog.com in the early 2000s, but more closed (it didn't want you to browse photos on mobile without the app)... yeah, revolutionary.

Re:Ask HN: What tech were you convinced would take the world... by zimpenfish on Friday November 17, 2017 @06:39AM (#15721165)
Flickr should have owned the simple sharing of pictures in a social network because ... they already had one. I'd consider that the biggest, most damning failure of Yahoo!'s management that they didn't immediately devote huge resources to countering Instagram when it appeared.
Re:Ask HN: What tech were you convinced would take the world... by ejolto on Friday November 17, 2017 @06:21AM (#15721055)
Instagram has a slick, easy to use, minimalist ui. Fotolog.com looks messy in comparison.