It looks as though Professor Loeb has a new book coming out next year. From the description:

Harvard’s top astronomer lays out his controversial theory that our solar system was recently visited by advanced alien technology from a distant star.

In late 2017, scientists at a Hawaiian observatory glimpsed an object soaring through our inner solar system, moving so quickly that it could only have come from another star. Avi Loeb, Harvard’s top astronomer, showed it was not an asteroid; it was moving too fast along a strange orbit, and left no trail of gas or debris in its wake. There was only one conceivable explanation: the object was a piece of advanced technology created by a distant alien civilization.

This is notable, IMO. It appears as if Loeb is going "all-in" on 'Oumuamua being a piece of ETI technology. I'd argue the writing was on the wall there but he seemed to hedge his answers to the question in the past. It's possible the publisher is taking liberties in their description but if this is indeed his position, what do we think?

Has he made a convincing enough case in his papers and articles in Scientific American? If he's correct, what are the implications for SETI? Should effort be refocused in some meaningful way?