I think that the FOSS Fediverse platforms are significantly resistant to enshittification.

That same article explores what enables enshittification and what precludes it:

The Netheads wanted to build diverse networks with lots of offers, lots of competition, and easy, low-cost switching between competitors (thanks to interoperability).

Fediverse platforms:

• are highly interoperable - e.g. you can use Lemmy or Kbin and still see the same posts
• mostly FOSS, so anyone can fork them whenever they want if they don't like some particular change
• most instances currently aren't operated for profit - certainly if your instance started displaying ads you could switch to another instance (or set one up) and still access all the same content as you did previously