Your response is moot if not naïve. Every piece of code written since the dawn of Eniac runs the risk of conflicting with other code.

Are you trying to paint a picture that somehow mIRC knows what to do when poorly written scripts, from various random sources, are loaded and that any new feature is going to damage this robustness?

What is this resistance to new ideas anyway? You say it is "very niche" but that is the nature of mIRC having such elaborate customization. There are parts of mIRC I, personally, do not use; does that mean I should ask that they be removed?