In fact, as Champion Data statistics show, 30-point leads are as unsafe as they've ever been in the past eight years.
Although there's only 27 games of evidence to go off, on 13 occasions a team has led by five-plus goals, and three times they've lost the lead.
That's blowing a 30-point advantage 23 per cent of the time, which is more than double the strike rate of any season since 2015.
https://www.afl.com.au/news/736320/momentum-is-king-why-five-goal-leads-are-no-longer-safe