> Spiking neural networks use oscillators for generating the signals but do not take advantage of the nonlinear interaction between oscillators, and so most of them do not belong to OBCs as we defined them.

I don't know if I share this view. The interaction between oscillators in a SNN is indirect but certainly non-linear by way of the network elements and how they process information.

I would think of STDP like a biological form of injection locking.