Note that coveryourtracks will be biased towards people who are private. It's a good way of identifying information that you're leaking, but you'll also see stats like 1 in 11 users disabling Javascript, which is just not representative of most of the web -- 10% of users on most sites are not disabling JS.
It's still very useful, but don't take every single number it reports as gospel. It's tracking how unique you are among people who purposefully visit a fingerprint testing site.
I casually browse with Js disabled. Everyone should. It’s a security nightmare to casually surf the web with Js enabled once you realize the frequency of WebKit/blink zero days being disclosed per month. iOS watering hole attacks are especially prevalent, even if those exploits tend not to be persistent. They just need to steal all your info once. Exhibit A: https://www.bleepingcomputer.com/news/security/google-warns-...
There are a lot of advantage to browsing casually with Javascript disabled, assuming you're OK with needing to manually fix some of the sites you visit. I browse that way myself as well; that's why I can see the results I see when I load up the tracking site. Side note that UMatrix is officially deprecated at this point, but it's still a great resource for disabling scripts globally and enabling them site-by-site as needed.
But 1 in 11 people on the web are not disabling Javascript.
It's still very useful, but don't take every single number it reports as gospel. It's tracking how unique you are among people who purposefully visit a fingerprint testing site.