Nearly there...
The image at the left is today's Aggregate Statistics Report from Giocoso. It shows that of the 16,796 recordings in my collection, I've played 16,713 of them since I started using Giocoso (or its prototype) in 2021. Lots of recordings I've played more than once, though, which is why the report shows I've played 19,501 recordings in total.
The key bit, however, is which recordings I haven't played: the 83 unplayed ones are detailed in the bottom half of the report: 19 of them last up to 2 hours and 64 of them last longer than 2 hours (I suspect quite a bit of Wagner and Verdi lie therein!) Let's say there's an average length of the unplayed recordings of 3 hours, then: 83 × 3 = 249 hours of total play-time. I could polish the lot off in just ten days, then, if I were to prop my eyes open with matchsticks and forget to eat, drink, shop or take exercise! [...]