This is the reality - most people won't spoof until they figure out it's the way to make a specific site work; and then they'll likely spoof for everything.
I'd also like to add that we forget that we're doing it, or at least I do. Once you set something up like that, there's never any reason to get rid of it; nobody is positively discriminating towards Linux.
I love when a ruleset (firewall, for example) has a "comments" field because I inevitably forget why I added something and then Chesterton's fence means I leave it forever, lest I spend hours a year later wondering why something broke.
Every time I try to change my user agent with a FF extension I get hit with brutal cloudflare captcha loops. How are you changing your user agent in a way that this is not a problem?
Actual reason: SBC retro handheld consoles now run Linux and people are using them to play steam indie games. The China holiday had some blow out pricing.
Non primary devices more likely to run Linux. Primary still windows.