In five to ten years, I am sure, the Macintosh will be superseded by a new model, like the Delicious or the Granny Smith. The Cairn Terrier, on the other hand has held its share of the market with only minor modificationns for hundreds of years. In the short term, Cairns seldom need servicing, apart from shots and the odd worming, and most function without interuptions during electrical storms. Cairn Terriers get along with everyone. And for communications with any other dog, of any breed, within a radius of three miles, no additional hardware is necessary.
All dogs share a common operating system.
The Cairn will run three standard programs, SIT, COME and NO, and whatever else you create. It is true that, being microcanine, the Carn is limited here, but does load the programs instantaneously. No disk drives. Admittedly, these are peripheral advantages. The real comparison has to be on the basis of capabilities.