But if this is to be a "universal" binary it has to interface with the OS, the DE and other native programs not just the browser. If not you will end up with S

But if this is to be a "universal" binary it has to interface with the OS, the DE and other native programs not just the browser. If not you will end up with Swing type libraries that look very off compared to native applications. Same for games really. You usually need to be aware of what platform (hardware and software) your run on and adjust for that to be able to use it optimally.