I don't even know. 92% or so of the songs on my laptops have only been played once or twice over many years. I could probably narrow the amount of mp3s on my Laptops down to a Top 100 most requested list, a wedding ceremony folder, a wedding cocktail hour and dinner folder, a country folder for the seldom times I need some country requests, a Dance/EDM folder for rare requests, a Disco/70s Folder, a General 80s, 90s, 2000s Pop/Hip Hop Folder with popular songs from each decade, and a Newer music folder. The Newer Music Folder would have less than 60 songs in it to choose from. The wedding folders would have less than 40 songs each in them, and the other general folders might have between 150 and 200 songs in each of them.
That would give me between 860 and 1,060 songs to work with phyiscally on my hard drive. I could realistically make that work for all the events that I do, and just stream everything else that I don't have from Spotify, Tidal, or You Tube Music. If I don't have the ability to stream from the internet, then I can be fine with what I have, and still pump out successful events. Just may not please the 1 or 2 people with a new song or off the wall request that I wouldn't have.
I probably have over 35K songs on my laptops though. I'm not going to check and add them all up.