I've only had my DNA a month. The last phone I bought was another "short lived" phone about a month after I bought it. I'm beginning to think Verizon looks at it's records and says "Hey, she bought another phone. Discontinue it!" I really, really like my DNA. It's the best phone I've had. Honestly? I don't like the look of the One...I'm not wild about the aluminum back, and I hate the white (although I think they're going to make it in black). I like the button placement on the DNA and see no point to the HTC logo where my home button is.
I'm hoping they'll continue to update the DNA, but if not, I am happy with it as is.