Vista, Leopard, Linux etc etc

It just seems like people never get tired of the debate as to which operating system is the best, with large crowds of followers on each camp. As an engineering student I find that at the end of the day all the three main OSs are equally effective and useful, and though each have its own strengths and weaknesses, as long as it can operate efficiently and get the task done (be it word processing, programming, web surfing, engineering calculations), then that is all it counts. Here is my opinion on each of the current major OSs.

MS Win Vista:
Pros:
High hardware compatibility (ignoring legacy hardware), supports vast majority of applications, improved graphics and user interface from XP. Better utilisation of dual/quad core CPUs.

Cons:
Expensive (overpriced?)! Prone to security threats due to the high proportion of users running Windows.

Mac Leopard:
Pros:
User friendly, intuitive and easy user interface. Have efficient tools for graphical work.

Cons:
Supports limited amount of applications. Limited support on other hardware outside of the Apple and affiliates' product line.

Linux:
Pros:
High flexibility. Great stability and security. Free! Open-source program evolves much faster and bugs/exploits gets fixed at a much faster rate. Customisable in nearly any way the user fancies. Great community-based support groups

Cons:
Lack of hardware support. Often difficult to find drivers. Requires greater technical skills/abilities to master (with Ubuntu as the exception).

But as one can observe, as long as the OS can complete the tasks required, with appropriate software (which by the way I have yet to find any task with which there is no application whatsoever that can accomplish it being supported by any one of the major OSs), then any one of the OS is equally useful. Maybe it is time to stop arguing as to which OS is best, but rather to spend our time on collaborating in how to improve the OSs/applications to solve real world problems.