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Also commentary like "The crux, of course, is water."

From the off, commentary is set as the standard:

"With more than a hundred 100F (37.7C in non-Freedom units)"

As far as using up their allotment of commas, you may be right. Past that it seems to stand okay.

Seems like they're channeling 60 minutes narration with all the commas.

The commas are fine. It's called apposition.