[gemstones]

Another wrinkle - lots of web apps have a need to say, I’m going to give you one bundle of JS for this whole hostname, regardless of URL, but then have to handle getting loaded from arbitrary URLs (that may have semantic meaning for your server) anyways. Everyone gets the complexity of a URL document hierarchy, even if your web app isn’t document-based.

[DanielHB]

true, it is called routing. But to be fair most mobile apps also have routing, usually with semantics similar, but still different, from web-based routing. The reason mobiles apps have it is for deeplinking.

Old school desktop applications didn't really have deep linking, even today it is quite uncommon (with the exception to trigger some action in the app like opening a file as opposed to navigation)