Some crawlers execute JS, but last I heard or checked even Bing’s crawler seldom did, and Google’s clearly tried to avoid doing so.
Of humans that deliberately disable JS, certainly going to be under 0.1%. (I’m one of them, incidentally, because on average it makes the web much better, lighter and faster.)
Of humans where various JS doesn’t run, due to having an older browser, a corporate proxy that blocks some things, a content blocker like uBlock Origin that incidentally blats your script, unreliable network conditions, and more things… well, that number is regularly quite a lot higher than 0.1%, often above 1%.
As for something like the Statcounter tracker, which these specific stats are built from, their methodology is obviously stupidly broken and has been for many years: ad blockers will tend to block it. (uBlock Origin does by default, and I expect others to as well.) And that number is generally agreed to be well above 10% (some say as high as 40%, though I’m sceptical of that), and heavily overrepresents users of less common browsers like Firefox.
Of humans that deliberately disable JS, certainly going to be under 0.1%. (I’m one of them, incidentally, because on average it makes the web much better, lighter and faster.)
Of humans where various JS doesn’t run, due to having an older browser, a corporate proxy that blocks some things, a content blocker like uBlock Origin that incidentally blats your script, unreliable network conditions, and more things… well, that number is regularly quite a lot higher than 0.1%, often above 1%.
As for something like the Statcounter tracker, which these specific stats are built from, their methodology is obviously stupidly broken and has been for many years: ad blockers will tend to block it. (uBlock Origin does by default, and I expect others to as well.) And that number is generally agreed to be well above 10% (some say as high as 40%, though I’m sceptical of that), and heavily overrepresents users of less common browsers like Firefox.