The Steam Hardware & Software Survey is out for October 2024, and the Linux user share has gone back up again to exactly 2%.

Overall:

Quite likely we're seeing the drop of Windows because the English language share overall went up by 8.09%, with Simplified Chinese dropping by 1%. We generally see the Linux share drop when Simplified Chinese on Steam rises, which it had done for two months in a row. So this seems like things going back to a more normal position.

On the Linux side here's the most used distributions: