I increasingly find little novel in programming technologies (at least those that make their way out of the academic research labs into the hands of real-world developers). I've already learned enough languages and frameworks and libraries that most new programming tools I encounter I can quickly size up as, "Oh, this is just like X only with A instead of B".

In short, the more of this sort of stuff you learn, the easier it tends to get to learn yet more. You might find some study of formal programming language theory useful, as being able to refer to language constructs by name could make it easier to categorize and compare & contrast them in your mind.