@RanTLaw Seems like that is, indeed what Adobe is doing - "you get 'AI', and we get to read the document."
Jesus Aitch.
My work machines always get the a perfectly fine windows PDF reader called #SumatraPDFreader.
It seems to have an active community and it works perfectly well.
https://www.sumatrapdfreader.org/free-pdf-reader
Those wary of data leaks can read, and compile the source.