Linux is the only kernel in the world with wide-ranging hardware support (due to its development policy). Everything else is either orders of magnitude more nic

Linux is the only kernel in the world with wide-ranging hardware support (due to its development policy). Everything else is either orders of magnitude more niche and only supports a tiny subset of hardware, or has a stable ABI and relies on out of tree drivers almost exclusively (Windows). Nevermind architecture support. No given person is ever actually running most kernel code. If you took only lines compiled into the core on an average system plus the line count of currently loaded modules, you'd come up with a much smaller number.