Not firm enough. Real-world organization comes from workplaces because you have a group of people with similar interests who see each other every day, as capitalism has become more atomized the conditions required to form those kinds of orgs have become more and more rare.

College campuses are the next best thing, but we've seen pretty conclusively by this point that college kids can't organize for shit either. I think the only hope of radical left wing organization in America is a militant group forming in an Amazon warehouse or Wal Mart or something like that.