It might of course be difficult to execute the judgment but they can still sue you in the EU. In the US that happens also, for example when some stakeholder sues a foreign website that infringes on their rights. If the sued entity doesn’t show up in court, they just issue a default judgment (meaning the plaintiff wins by default). You can even sue a John Doe in court (at least in the US).
In practice, the EU is also resource constrained like any other government entity, so you probably won’t have much to fear. I mean they’re not going to sue millions of companies all over the world, it just means they have created themselves a new stick that they can choose to use.
I hear that they’ll likely first go after entities that have a big impact on the public (i.e., the most blatant cases).