Well it's the first interstellar object to visit our solar system "that we know of"... We have never had so much capability to see out as we have right now.
When I worked for the Palomar Mountain Observatory(Caltech), I was amazed to find out that there are just thousands and thousands of Photo plates from the Palomar Sky surveys that have not actually been analyzed. There is a lady up there buy the name of Jean Mueller that is a telescope operator, and spends her spare time staring at plates. She has been doing this since the 1985, and has named many planets, near earth objects, and supernovae...
My point is, we have not even scratched the surface of what is out there...
Yes, I mentioned it in the post that it is the first interstellar object to visit our solar system that we know of.
Yes, with hundreds of billions of galaxies with hundreds of billions of stars in them and them having some planets revolving around them, one can imagine that we might probably never explore even a tiny fraction of the universe.