> People today aren't any more or less sophisticated than the people of thousands of years ago, and them no more than the people thousands of years before them.

Well, yes and no. We certainly know a lot more than people knew back then. We know vastly more about the cosmos, we know about atoms, we know about evolution, we know much about the brain.

We also face very different challenges than people millennia ago - we have weapons of mass destruction, more obesity than famine (in developed countries), social media, and so on.

Thus, I'd say only a small part of philosophy is still applicable and valuable today. (For example, Seneca was a Stoic, and Stoicism had much to say about physics and logic, which is pretty obsolete now, I'd say.)

There's a potential fallacy there, like thinking that old music was better, when what we still hear today is just the very best of old music.