>> What was the common misconception?

> That the rule change was a done deal.

What are you talking about? The rule has already been changed in the NASDAQ. That makes it a done deal.

Anything changed can always be undone, but to be clear it has already happened. That makes it a done deal.

The S&P change was taken as a done deal. Search that page for S&P. The indices that flipped are less relevant than many individual active managers.