> When it is worth the pain to load a large bundle in exchange for having really small network requests after the load

...and yet, i keep running into web (and even mobile apps) that load the bundle, and subsequent navigation is just as slow, or _even slower_. Many banking websites, checking T-Mobile balance... you wait for the bundle to load on their super-slow website, ok, React, Angular, hundreds of megs, whatever. Click then to check the balance, just one number pulled in as tiny JSON, right? No, the website starts flashing another skeleton forever, why? You could say, no true SPA that is properly built would do that, but I run into this daily, many websites and apps made by companies with thousands of developers each.

Yeah, I see a lot of poorly written back-end APIs too.