Earlier quoted context omitted.
It's hard to differentiate between completely disabled JavaScript, some individual JavaScript files being blocked by an (overzealous?) ad blocker, and the browser not implementing some required JavaScript feature.
I've been using NoScript for about a month full-time.. and it's insane the things you can leave blocked and still see a site as it's meant to be. Ads, trackers and internal tools that somehow I have to contribute my data to, and their accompanying libraries EASILY make up 70% of all JS.
Citation needed. Literally 100% of the JS code i've written over the past 24 years has been 100% free of "ads, trackers, and internal tools that somehow users have to contributor their data to."