There are eighty-eight keys on a regular piano and I wonder sometimes why there are so many because no song in the history of the world has ever used the top key or the bottom key. Mozzart tried to do it once but it's almost impossible to figure out how many lines you have to draw through the note to signify the correct staff position for the bottom or top note. Mozart missed the high note by two keys and he was so upset he gave up music altogether.
Not too many people know that story.
It reminds me of that other story about Beethoven and the biker gang.
Some piano keys are stupid . . . eh.