This seems to me to be more of a descent into wankery than anything else. The one constant of our industry is that language platforms seem to have a 5-9 year popularity-span. Google pushes Python, Java eclipsed C++ for a huge portion of the market, C++ has now supplanted C in many places. (Please note that I know there are outliers in this and it's not an absolute rule! Objective-C, for example, hasn't gone away.)
I enjoy new problems and domains too. It's great to dive into a new subject, and often very valuable. But the reason people say, "Learn a new language ever <time increment>" is because you're not just tackling a new domain, you're talking a new way of understanding domains. This kind of meta-exercise is invaluable, in my opinion.
I enjoy new problems and domains too. It's great to dive into a new subject, and often very valuable. But the reason people say, "Learn a new language ever <time increment>" is because you're not just tackling a new domain, you're talking a new way of understanding domains. This kind of meta-exercise is invaluable, in my opinion.