In our 2020 State of the Tabletop RPG Community Survey, we asked participants how about the size of their dice horde. Here is what we learned:
The average tabletop roleplaying gamer has about 25 sets of dice. The most often reported number was 5, however. This suggests that the 25 average is skewed heavily by a small number of people with a 💩-ton of dice. In fact, one person self-reported owning 1,050 sets of dice!
Not many tabletop gamers have just one set of dice. Single-set owners are endangered, but not extinct. 2.7% of the tabletop RPG community owns just a single set of dice.