Mentioned this in another comment [0], but analytics.usa.gov has the % of visitors on Linux operating systems at 5.7% in 2025, up from 4.5% in 2024. Of course "visitors to U.S. government websites" is not fully representative of all U.S. computer users, but it's worth noting.
[0] https://news.ycombinator.com/item?id=44582058