If you are happy with 10.10, there is no reason in the world you need to change
it. When 12.04 is released, you will want to make a decision about where to go.
I'm not a Kubuntu user, but I figure there is a good chance I will be, unless
Unity has some magical improvements.

The article made a couple of good points, but some of it was just smoke.

Security should be no more of a concern now than it was when you installed
10.10. The biggest danger is the person at the keyboard. How's your backup? Hard
drives die at the most awkward times.