Oh, certainly. Some of the early online DIY publisher platforms (Lulu and iUniverse come to mind) had a rough time but they stuck it out and now there are dozens of selling outlets for authors. One of the problems back then was getting your book reviewed in papers and magazines. Most reviewers would not accept self-published titles. Now, authors don’t need that type of boost to announce or lend credibility to their work. Self-marketing is as easy as selling directly to your social media followers, who are already receptive to your thesis.