Sounds like my use case for Flickr differs a lot from the ones mentioned here. I don't store everything there (Over a terabyte of raw photos etc is not worth publishing;-), only photos I want to publish as an enthusiast photographer and see other photographers photos + talk about them. For that Flickr still trumps over 500px, Facebook* and any other service I've seen. Would've probably quit photography as a hobby multiple times without Flickr.

* Facebook is where other people are and there are some good groups but for really following other photographers it sucks + FB molesting JPEGs is just horrible.