Free Windows 10 support ended for most people this past month, and the trend line of Linux usage has been quite clear leading up to this, as people prepared for the inevitable. An increase in Linux usage is also correlated to a drop in Chinese players, which did happen this month a little bit, but Linux usage is also trending up when filtering for English only. It’s worth noting that for all the official support Macs ever saw in gaming, they never represented anything better than about 5% of the market.
Probably sound advice if they are in (presumably) the 0.01% of users (like you) that need other utilities that are hard to get.
If they aren’t, then Bazzite, etc would be perfect for them (as you said, zero issues with gaming/more common uses).