I can’t speak to the quality outlook, but from what I understand about enshittification, it typically requires a self-serving entity like a corporation whose interests are not in alignment with its customers/consumers/userbase. In some of Mr. Doctrow’s writings, he indicates that federating cans be a “circuit breaker” for enshittification.

In a well federated platform, when one node begins to act counter to its users, the users can easily move nodes/instances. This is one of the reasons why there needed to be a law to allow phone number portability. Email is similar, but only if you own your own domain. Look for Cory Doctrow’s writings on BlueSky for more examples.