Why would it be strange that there are steam decks that sit unused ? I have a switch and a PS 5 that go untouched for months (even with a 4 year old who I occasionally let play some games). I think most people in my friend group are similar in that they have some gaming gear but rarely the time to use it. Still nice to have once you do.

These stats are probably skewed by how much people play. Competitive FPSers and MMOers play a lot, and the genres are the least friendly to Linux for various reasons.