Every site is a JS-application monster because of the 3rd party add-ons people feel they need to have. Running Google or FaceBook ads? You need analytics, pixe

Every site is a JS-application monster because of the 3rd party add-ons people feel they need to have. Running Google or FaceBook ads? You need analytics, pixels and event trackers to know if you're ads are working optimally. ReCaptcha v3 is a good way to slow down your site as are hero banner sliders (5% of sites were running GreenSock + Waypoint), also some flavour of interactive chat. Some 3rd party plugins simply don't work with async/defer or still use DOM write().