I used what was termed a "transactional broker" when selling my previous home - I paid a flat fee of a few hundred bucks to them as the seller's agent, plus 3% to the buyer's agent. As the article mentioned, there's not much value driven by the selling agent - I managed all the showings via an app and we sold it in a week. The only real value to me as a seller is someone who can bring me a buyer (hence keeping that 3% commission). Buyer's agents also spend time taking clients to see houses and provide some assurance that people aren't arranging viewings just to steal your stuff, so I see a continued role there.
Honestly, I've rarely been impressed by the real estate knowledge of either type of agent. Their general incentive is to make a deal happen - "seller's" agents will often try to talk up a below market offer if it gets them a commission faster. Likewise, I've only met one realtor who I felt was really trying to get me the best deal as a buyer.