It is, great post! Djedefre (elder son and successor of Khufu, although I don’t remember ever hearing that mentioned on *any* documentary, and I’ve seen a half dozen or few hundred) died not long into his reign, and his pyramid had barely begun. Something like 89 percent of the mass of a pyramid (other than, say, the Bent Pyramid, which is even heavier on the bottom) is found in the lower half of the structure, so if it took 20 years to build the Great Pyramid (for example), the first five years wouldn’t appear to accomplish much.
Uncle Djed’s pyramid (that was the nickname given to him by Menkaure, although I can’t substantiate that) was left unfinished and probably lost under the sands. In the 18th and 19th centuries it was used as a quarry, and camel-loads of masonry vanished into Cairo. The site is basically a big hole in the ground.
I first heard of the site when I watched a 5-part documentary called "The Pyramid Code" (on NetFlixs, if you're interested and haven't seen it). I don't take the documentary too seriously, what with its "indigenous wisdom keeper" as one of the primary experts, but it did have a lot of footage of stuff I hadn't seen before. So much stuff in Egypt makes you scratch your head and wonder why? how?