Fictional FTL

In 1956, Poul Anderson's first Nicholas van Rijn story, "Margin of Profit," was published and I began to attend a boarding school in Scotland where I read my first sf novel set in a civilization with faster-than-light (FTL) interstellar travel, Starman Jones by Robert Heinlein. It was in a large-format multi-authored omnibus volume and I neither knew nor cared about authors' names although I soon afterwards learned the names of Heinlein, Anderson etc.

We have become very familiar with fictional FTL, the cleverest version, I think, being the hyperspace in Anderson's Technic History. I have recently started to read CJ Cherryh's Downbelow Station which also has FTL spaceships entering planetary systems and docking at space stations. This has become a familiar piece of background backage.

I predict that:

FTL will not be discovered in our lifetimes;

if and when it ever is discovered, it will be completely unlike what anyone has imagined.