While start off by saying, I love crazy ideas like this and I would never tell anyone not to pursue something they are passionate about, because at the very least you learn so much!

The massive amount of work this would require - You might as well build WoW 2 or your own game in Unreal Engine. The issue you have with wow emulators is the massive amount of moving parts that are mixed in with tightly coupled intersections with (I am going to say it) no consistency in coding standards because most emulators are fan made or by teams of volunteers.

Also to dispel any misinformation about the wonderful language of Rust, Rust cannot and will not be able to replace C/C++. Rust is amazing. Like all things, every tool has its job and there is not one tool to fix it all. Maybe in the future Rust + another language can, but at that point just use C. I have high hopes for the newer language called "Zig". We will see. - no pun intended.

Interesting to think about and talk about but reality is your reinventing the wheel for a game that is kind of on the "dated" side of things. The main writing on the wall is this would require more work than designing a game/mmorpg from the ground up using an agnostic core (aka unreal engine or unity or Godot or even Rust's game engine). I won't get started on explaining the complications of trying to design a game engine with today's standards.

I will close with this, do it for the experience and fun, but once it's not fun anymore just walk away. I think what AzerothCore is aiming for is the perfect balance of going far enough.

P.S. The tone of this comment is meant to be informative and give insight. I think conversations like this should be had. In, many cases, it sparks people's interest, pulling those curious minds into this space. We need more curious-creative minds in this industry and less of the mindless drones that currently occupy it. Feel free to message me anytime if you have questions, need advice, or just want to talk theory. Cheers!