Ask HN: Generalists, when do you say "I know enough" about any particular topic?

The idea is generalists know a lot about everything and when to pass it off to a subject matter expert.

In 2025, with everything in tech changing by the minute, I’m realizing I need to set boundaries about how deep I go on any particular topic. But I’m unsure how. Particularly if I don’t want to get left behind as things continue to evolve.

Curious how other folks approach this?