Windows and Mac OS software is tightly tied across the entire stack. Linux is more modular. For example, on Windows or Mac, you can't exactly swap out the entir

Windows and Mac OS software is tightly tied across the entire stack. Linux is more modular. For example, on Windows or Mac, you can't exactly swap out the entire Desktop UI - on Linux you can, quite easily, without affecting the rest of the system. Additionally updates for Windows and Mac need to be EXTREMELY robust, to avoid breaking lots of peoples computers. And its hard to write robust updates for non modular systems. As a result, updates to Windows or Mac are often overkill - instead of updating some library, a bigger chunk overall gets updated to minimize the chance of affecting the OS.