Why are we still studying Plato, Aristotle and Socrates?

We've had 2,000 years to build off where these guys brought us. So, where are their successors today? Even Freud (a "modern-day" philosopher) died more than 70 years ago?

Are the modern day Platos out there, and we're simply laughing at them - only to worship them after they're dead?

I don't see in poetry anymore.
Too much non-fiction, I guess.
Now, I see cause and effect.
Victims of their own circumstance.
The romantic language of Main St. vs. Wall Street gets lost on me.
I only see the truth.
But, there was truth in the leaves laughing.
Perhaps even more of it.