a snippet of every song to hit number one on the Billboard Hot 100 since 1958

Great to see the evolution of musical sounds over the years. The arrival of Elvis predates this list. Another massive change occurs in 1964 (guess why). Main difference between early years and much later is that a wide variety of artists and styles has been pretty much changed into sound alikes.
AM top 40 radio in mono (FM was not a thing until the end of the 60s) was awash with variety, hard rock followed by corn pone country by broadway hits and elevator music like lawrence welk. and soul groups, pop divas, all on one station.