How to style layers with SLD in OL3

It seems like not long ago in OL2 there was a nice way to style layers with SLD and it seems like now it is not possible to do the similar thing in OL3. At least, I could not find any example on the web and in official OL3 documentation I could not find even a single reference to SLD. So, why is that and how people in real world applications store/save styles if SLD format is not supported any more?