> Yeah other reasons I've heard of include the obligation to adopt iOS-specific APIs for features like scrolling and text inputs
TBH I'm fine with that. Applications, browsers or not, should use the operating system's components and APIs for things for a unified experience across all apps and interactions. On the desktop side of things, I hate when an application breaks convention for the OS it's deployed on. If I'm using macOS, for example, I want every app on my mac to look and behave like any other, consistent with the rest of the OS.
I’d say it’s even more important on mobile than it is on desktop. Third parties re-implementing things like the keyboard and IMEs are unlikely to do those anywhere near as well as the OS does, not to mention how custom implementations would break password manager integration, user-selected third party keyboards, etc.
TBH I'm fine with that. Applications, browsers or not, should use the operating system's components and APIs for things for a unified experience across all apps and interactions. On the desktop side of things, I hate when an application breaks convention for the OS it's deployed on. If I'm using macOS, for example, I want every app on my mac to look and behave like any other, consistent with the rest of the OS.