> This is a personal project aiming to replicate analog coupling dynamics with asynchronous digital circuits FPGAs, not a claim that we can solve NP complete problems with a fundamental speedup.

Then you shouldn't have led with that? It's like academic clickbait to say "here's this thing I'm working on, it uses XYZ technique to solve REALLY HARD PROBLEM" but omit the "...very poorly" part. Like I said I don't entirely blame you, I blame the academics that have an entire cottage industry and culture around these kinds of "results".

> These sorts of Ising architectures get their speed-up are based on oscillator interaction, not parallelism.

Not sure what you're trying to say - it's quantum annealing "brought to life" using simple 2-state (up/down) particles/phonos/whatever you want to call them. The quantum in quantum annealing means superposition ie parallelism; your implementation is basically a D-Wave machine without the qubits.