[cyptus]

analog chips could also be very interessting instead of using digital signals and processing them against the weights in the ROM. I have no idea if that scales with such big models though.

[mdp2021]

The drawback is in keeping signal fidelity (e.g. dissipation, temperature etc.) and in the conversion between analogue and digital.

Nonetheless, yes, there are already implemented solutions for small NNs (I understand mostly acting as triggers).