I liked the feed feature; I understand it wasn't used a ton, but I did enjoy looking around and seeing what people were making. It's now just another portfolio site in the vein of caard. I already have a personal site, so there's not much need for me to visit since I can't really find anyone else.
I started using Polywork recently and was pleasantly surprised by the deep well of opportunities listed here. It was nice to see a site for someone like me -- I dont just have a job, i'm also on boards, i'm an investor, I want to participate in community projects. Polywork was great at helping surface interesting opportunities for active people looking to get involved and grow themselves across many dimensions.
Everything that's wrong with LinkedIn, is done right on Polywork. I have a huge following on LinkedIn but I can NOT wait until we all move over. The network is welcoming, the features match people's professional lives much better, and it simply is an all-round improvement from design to functionality.