> If your site is well engineered to progressively enhance without disruption, it does not matter if JavaScript is being loaded in the background. Yes but how

> If your site is well engineered to progressively enhance without disruption, it does not matter if JavaScript is being loaded in the background. Yes but how many places actually make this effort? Seems to me that most places are very content to make some monstrous multi-MB React/Angular/etc app, ship it and wash their hands. The number of websites that have actually gone to the effort of optimising their sites is extremely small, so I'm doubtful when someone says "oh but web apps can do this too, if you only just progressively load/build it properly/etc" because that implies effort that so far, seemingly no one has gone to the trouble of actually doing.