There's a law here that prohibits the operation of 'motorized bicycles' on multi-use paths 'with the power unit in operation.'
That would, I assume, include all PAS functionality.
So I built a 40mph e-bike to ride on the road, problem solved!
I don't think anyone cares about enforcing that though, on my bikes they sip power so gently in PAS mode that you would never know it.
Our bike cops thankfully have not cared because I think the general understanding is that only older people not in perfect health ride these things rather slowly and harassing elderly on bikes is not cool. I too ride slowly and really only take the bike paths at night when it is more dangerous to be on the road.