I would write it myself. Why? Because maybe I wanted to add it to a specific module of mine that handles UI. It is not worth it for a plugin to do it, because there’s no way it’s more flexible than just writing the line myself, where ever I want.
The line to disable coregui is one line, while your plugin is 188 lines total. And if you only count the 5 scripts that disable coregui with one line, now 5 scripts need to load instead of the one that already existed in your game which you would implement the one line of code I showed.