Does falling damage by weight get limited to 20d6?

I’m trying to build a character that does damage by dropping on people. (It’s a baleen whale with grafted wings.) I was reading the SRD on falling damage and it has this very confusing line about falling objects:

For each 200 pounds of an object’s weight, the object deals 1d6 points of damage, provided it falls at least 10 feet. Distance also comes into play, adding an additional 1d6 points of damage for every 10-foot increment it falls beyond the first (to a maximum of 20d6 points of damage).

Is the total falling damage limited to 20d6 or just the falling damage from height (which would make more sense since falling damage is limited because of terminal velocity)?

Are 20D6 sonic damage every turn overpowered compared to any 5th to 7th level character ability?

The question is born from this question. Is 20D6 sonic damage every turn overpowered compared to any 5th to 7th level ability? Specifically, turning into a muse using the fey form spell and obtaining the Sound Strike attack, which we can break down to 5 ranged touch attack which deal 4d6 each. As written in the title, at any character level between 5th and 7th.

For object fall damage, does the 20d6 maximum apply only to the additional damage from distance, or is it an overall maximum?

According to the DMG, page 303:

For each 200 pounds of an object’s weight, the object deals 1d6 points of damage, provided it falls at least 10 feet. Distance also comes into play, adding an additional 1d6 points of damage for every 10-foot increment it falls beyond the first (to a maximum of 20d6 points of damage).

I read this to mean that the damage added by the distance of the fall caps at 20d6, but the damage based on the weight of the object doesn’t have a cap.

A friend of mine says that remembers a lot of discussion on the topic years ago, and remembers a ruling that the damage that a falling object deals has a hard cap of 20d6, regardless of additional weight.

Unfortunately, he can’t find where the stuff he remembers was said, and so all we have to go on is the text in the book. Does anyone know what the proper right answer is? Preferably with a source?