"In 2011, when Google+ just started, some high profile people said they were walking away from their own self-hosted domains and just redirecting to their Google+ profile, which was flying with comments and +1s. I warned against this move, saying "I Gave Away My Web Identity. All I Got Was a T-Shirt." Even when the product you're pointing to is high quality, it's very unlikely a stream-oriented product can match the quality and depth of longer form content that belongs to you."
He quotes an article with a similar message, "Why Blogging Still Matters: Data, Distribution, and Ownership of Content" by Adam Singer