I saw some devs who slap a JQuery plugin there, another plugin there and so on and various other third party JS libraries. And then the page load involves 1MB.

I saw some devs who slap a JQuery plugin there, another plugin there and so on and various other third party JS libraries. And then the page load involves 1MB. Or SaaS websites that have a single-page web app with a 4MB JS file. And their user interface looks like designed by an committee. The single page web app has a long loading time, looking with DevTools it turned out it's a GWT+Ember ugly monster, that was slapped onto their old rusty Eclipse based Java product. The little information they can show is shown on a 7-times nested navigation page structure so they can advertise it as "drill down" whereas competitors show all info on a maximum of 2-3 times nested pages, and most info is visible without a single click. And the bad one is very much into enterprise with a huge sales stuff, the better competitor is a SaaS-only company.