Kurotowa
Legend
D&D is, after all, still a geek hobby. There are a lot more people willing to identify as a geek now, you can fly your geek flag a lot more openly, but it's still a geek thing. And geeks love their history.Legacy. You may think a new direction is necessary to attract and keep newer players, but legacy is a strong attraction. I know when I started D&D I didnt want it to fit my perception of what was hip, I wanted to know its history.
There's a push and pull at work here. Old and out of touch is bad, but attempts at artificial hipness and tone deaf pandering are just as bad. People want something with a deep history and rich lore, but updated for modern sensibilities and all the best new features.
That's why you see old properties being constantly reimagined and recycled. It uses the established history to build depth and legitimacy, but ditches the parts that have aged poorly in favor of a fresh take.