I have Seafront Simulations’ Core Library and Global Shipping add-ons.
I still see a few ships every now and then, but prior to AAU1 and Core Library’s update this past week, the coast opposite KLAX, for example, was brimming with ships.
Now, ships are so infrequent, I thought I accidentally deleted the add-ons. Nope, I still have them, they just broke apparently.