It happens more than anyone wants to admit, but even at 2g speeds, 256kb takes almost 20 seconds to download (I get about 120-180 kbps). When sites provide the HTML and CSS, I can usually stop the page from loading and at least read the content within a few minutes. When there's a js bundle, there is usually a fairly large initial bundle, then that loads a couple of other bundles ... and I'm still looking at a white screen, and not even a loading animation (from the browser or the developer) because as far as the browser is concerned, it has loaded the HTML and most developers don't even realize they can edit the base-line HTML sent to browsers because they never even see it.