I very much hope this individual turns out to be correct, and that other RPG developers don't try to copy BG3. Since BG3 is a piss-poor game to me, the last thing I want is for BG3 clones to start popping up.
And to be clear, what I want in an RPG is very much great writing, deep and immersive story, strong character development, branching dialog, extensive character customization and reactivity, etc. But I reject the notion that we're getting any of this from BG3 in a truly meaningful and non-superficial way.
If you want to spend your time discussing RPGs you hate, RPGcodex is two blocks away.
If someone's posts bother you that much that you can only respond to them with snark, there is an ignore feature on the forums. Have you considered using it? As it is, your comment adds nothing to the discussion, and only creates more drama.
On topic: on principle I have to shake my head at these types of ideas that a specific game is going to change the course of video game history forever. it's going to be a financial success, it's going to influence AAA games I'm sure, but it won't be "killing" anything, unless people are trying to compete in the exact same market to the exact same audience.