I don't know, I found that having kids gave me far more time to keep my skills up to date. Though, after having user CVS, Subversion, Mercury, GIT and more, sometimes the issue is that having gone through so many stages of evolution, it's hard to unscramble the different tools. In my case, it often is a lack of patience with the new tools with watching the same damn mistakes being made over and over. I really like GIT, but when I was forced to work with bazaar, the tool of choice from the 22 year old tool hotshot, I constantly found myself baffled senseless when I'd try to check in code and I'd find myself having to check out and repatch manually to check in. Personally, I felt it was less an issue of me specifically and more an issue of a tool which takes the enacts route of making 10,000 things easier, but removed the simplicity of the basic function of the tool which was the ability to check out and check in.
I think often younger programmers come in with new tools such as python and a dozen other new scripting languages, but some of us have been scripting or coding in thirty different languages over a period of decades. It's not that we lose the interest in learning new tricks. It's that we want to see that there is actually value in the new trick before wasting time learning a tool which might simply not offer any benefits. Personally, I finally bent and learned python (which is still consider sloppy as hell) and the some numb nuts insisted we needed Ruby too. After a few iterations of that, you end up with a code vase employing 10 languages and when the kids who added that code move onto their next job, we need to replace them with a new guy who now has to learn 9 new languages just to get started. Sometimes limiting yourself to a two or three lesser tools which take more work is more efficient in the long term.
I agree with the original post that people need to adapt to new methods and technologies. Someone who isn't interested in test driven development or peer programming or code review in a modern market is pretty much useless.