Basically if you read my other post I am brand new to the Mac world. My question is does the macs performance degrade over time like a windows based machine? From my understanding you would have to almost intentionally install spyware on a mac and viruses are non existent. So If we dont get spyware or viruses and there is no registry, am I safe to assume that the performance I am getting now will be constant for pretty much the life of my machine?