The title of this book has always had multiple meanings. Originally the eponymous organization that the book is about, and also the "foundation" of the recovery of the galaxy from the dark ages. Over the years it has also become the foundation of many tropes of science fiction.

Setting that aside, it holds up as a solid set of stories that are well written (outside of characterization, which was never a strength of Asimov's). The brevity of its style makes it worth a read even with its flaws.

Those flaws include the following: Much of the science of this science fiction is not considered theoretically possible today (although much of it was when it was written, our collective understanding has grown since them). Few of the characters have any real characterization at all. There is exactly one woman character in the entire book, and she's a caricature. This last one is especially glaring in light of the recent adaptation to television that features multiple women in major roles without even changing any of the character's names!

Overall, still worth reading after all these years.