I should have linked the Wikipedia page I cited and noted the reference to theory seeking to extend the standard model, which I here rectify.

My nescience of top physics - of physics generally, TBH - appears to have confused me regarding such hypotheses and their speculative nature, as opposed to the standard model. I very much appreciate you clearing up that confusion.

"...we will have to wait way more than four years to get the final words on that story."

The next chapter is the next leg of the journey, and the journey is the destination in science, where the final word is never written.