Honestly, if you just block or ignore the feed, the other features - profile, social graph, messages, job postings - are basically fine. My biggest complaints o

Honestly, if you just block or ignore the feed, the other features - profile, social graph, messages, job postings - are basically fine. My biggest complaints on the job seeking side are the mediocre recommendation system and the lack of high quality level and compensation data for roles (like levels.fyi has); on the hiring side, a good recommender would also be helpful, as would better filtering tools. But if you want to replace LinkedIn as the primary sourcing tool for many roles, solving those problems is the easy part - the hard part, like you said, is building up a two-sided network at anywhere LinkedIn's scale. Would you sign up, make a profile, and respond to messages on a new LinkedIn alternative that has no first-party job listings and no recruiters for companies you'd want to work for? Most people's answer seems to be no, based on all of the failed LinkedIn competitors that have been tried over the years.