Which System is the Right One?

The technological world hosts a great deal of variety, both in ideologies and implementations. One specific example is whether operating systems should be closed (Apple), open (Microsoft), or ridiculously open (Linux). The different core beliefs of each system naturally lead to very different implementations, and thus each method is innately more proficient in some tasks than its competitors, and more deficient in others. People tend to become attached to one or the other and then argue over why all the others are woefully inferior. Personally, I think that's silly. Would we really want to eradicate the others so that only one remained? In what way is it a bad thing to have a variety of different solutions for our many different needs? In what way it a bad thing for competition to drive each method to iterate and ever improve? We will never have a "perfect" single system, but we can at least have a powerful conglomeration of these unique ones.