I saw that one early on and then saw the NACHI people heatedly arguing, so that's when I decided it's controversial.
Usually, asking for specifics for each option, dollars saved or comfort gained or shingle lifetime extended, makes most people pick up their marbles and go home.
When all else fails and the issue is important, read
This book says 'extraordinary claims require extraordinary proof' but the claim of either side is not extraordinary.
I have gable vents, no soffits & no ridge, and for a long time I had an attic fan which finally failed, and then some people said the cost of elec. to run the fan is more than the savings.