Ni converges, as most people do say, but the convergence is toward the grand zero where everything is everything else. The archetypes, those that exist, hover around the edge of this null, on its event horizon. That, possibly, is where we seek to go when introverting intuition, looking for the background processes in all cognition.
It's odd then to talk of the subject. Certainly the content of Ni is subjective objects. But they're made out of everything else so, y'know, they're bigger than you think.