The worst number in business is one. One of just about anything is a bad thing.
In my home office, where I work under deadline pressure as an advertising copywriter, I do not have one Mac. I have three. Why? So when Mac No. 1 freezes up, crashes or requires an exorcism, I can move what I’m working on and urgently need to print out before the day’s FedEx deadline to Mac No. 2. And in case Mac No. 2 has indigestion or leprosy that day, I have Mac No. 3. I keep them in different rooms to prevent contagion. My Mac is my employee. If Mac were a living, breathing human employee who, say, printed what I wrote in booklets on a printing press, I’d want at least two of those Macs and two printing presses. Never one.