It's relevant because the dramatic action of stories will transform over time. Literature affects an audience based on their pre-existing context: culturally, linguistically, and personally. The more time that passes, the less and less able an audience is to view the piece through the lens intended by the author. This is why its passingly common for people to analyze even contemporary literature through the philosophy that "the writer is dead"...and why many writers refuse to speak too much about their intent.First, I don't understand how is the age of Witcher books relevant anyway? And second - I'll be very happy to be proven wrong by Netflix. But what I saw in the trailers don't give me much hope for a good adaptation. Let's see.
So, even though a piece may have been wildly popular when it first debuted, less than one generation later, it's considered utterly ridiculous and fades into obscurity. Another piece may be completely ignored for 30 years, then suddenly lauded as a "major hit -- far ahead of its time" because suddenly that viewpoint and message is popular. A piece may be wildly successful in one country, but utterly incomprehensible to the next, since it's so deeply rooted in the colloquial nuances of that particular culture. Yet another piece may be so particular to a specific tradition or sub-culture, that it is instantly successful, but only among that small group of individuals, becoming a "cult hit".
So, I would say yes -- the age of a piece is a major consideration -- especially if trying to adapt it to a different medium. Also, it's impossible to completely remove contemporary context from the interpretation of any art. Objectivity is only feasible up to a finite limit. Everything is subjective at its core. Even our understanding of "objectivity" is reliant on our subjective experiences that granted us that unique understanding.
I think the series was nicely timed. That's big. I'll admit being more impressed by the trailer than I thought I would be. Whether or not it speaks to people now, we'll see.