You may hear that this or that protocol has an incremental feature advantage over ActivityPub. Sometimes this is true; often it's just misunderstanding of how AP works.
But incremental features don't win. We have a structural advantage over any other protocol. ActivityPub is a formal standard, backed by one of the most respected organizations on the planet. It has hundreds of implementers, tens of thousands of instances, and millions of people on the network. Diversity is our strength.