Does Loeb plan to apply this thesis to every interstellar object ?

The three known interstellar object to pass through the solar system were 1I/ʻOumuamua, 2I/Borisov and now 3I/ATLAS.

Did he give Borisov this treatment? It seems not, so then the answer is "no, only about two thirds of them".

	▲	TheOtherHobbes 8 days ago \| parent [-]
		Even so, the probability that Loeb will hint that 4I/whatever could be a probe approaches certainty.

moi2388 8 days ago | parent | prev | next [-]

Not just interstellar ones, also any rock you might find on the ocean floor..

Seems like it, why not. The paper says it is provided as a guide for future interstellar object.