I understand, but why would you need two copies? You can run the same license on 2 machines at the same time. Yes, you own it but since they release new versions every year it can outdate very fast. In your unique case it probably doesn't make sense to upgrade for your needs, but what if there's features in the new versions that can make you better at what you do or make things easier? I think you're scared of change.
I use CS6 on my desktop and my laptop. My wife uses CS6 on her laptop, and we occasionally have an intern on another desktop. That's why we need 2 licenses.
As for being scared of change, I like how you young whippersnappers always assume NEW=BETTER. It's not the tools that make for good design: It's the mind and the ideas behind the design. A few years ago when "desktop publishing" was just taking off, everyone who was anyone was using dropshadows everywhere. What new CC feature is today's "dropshadow"? Looking back, it's clear to me that many designers adopt a herd mentality for whatever is considered the latest style or way of doing things, which is fine, but it's not a compelling reason to do the same.
Software does not make you a better designer.
You're going to turn into one of those people that puts out stuff that constantly looks like it's 10-15 years old.
You mean like "Classic" and "Stands the Test of Time"? Thanks! I'd much rather do that than constantly follow trends that disappear in a couple months.
EDIT to ADD: Here's a link to a blog post I did a couple years ago about why I don't subscribe to CC.