I still don’t understand how iOS hasn’t been obliterated for the aggressive technical limitations Apple puts in there that make switching the default apps impossible for the user (browser, music player, email app, maps, Siri, etc.)

Taken from Wikipedia article United States v. Microsoft Corp.

The case against Microsoft was terribly similar, with the only exception being that MS didn’t sell its own hardware back then.

If the bundling into the hardware is the reason why Apple is protected, then I think regulators continue to demonstrate how behind they are.