❌ No, we couldn't find enough information regarding this on authoritative news outlets to support the claim that living longer after age 80 is mostly down to something other than lifestyle. Here's what we found:

- https://www.bmj.com/content/345/bmj.e5568 (Trust Score 9/10)

- This study from the BMJ indicates that lifestyle behaviors such as not smoking and physical activity are associated with longer survival even after age 75. It suggests that a low risk profile, which includes healthy lifestyle behaviors and a rich social network, can add several years to one's life, even among the oldest old and those with chronic conditions.

- https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.117.032047 (Trust Score 9/10)

- This article from the American Heart Association journal Circulation shows that adopting healthy lifestyle factors such as not smoking, regular physical activity, a healthy diet, and moderate alcohol consumption can significantly prolong life expectancy. The study does not suggest that the importance of lifestyle diminishes after age 80.

- https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2820220 (Trust Score 8/10)

- This study published in JAMA Network Open found that individuals aged 80 years or older who adhered to a healthy lifestyle, including not smoking, exercising, and having a diverse diet, had a higher likelihood of becoming centenarians. This supports the idea that lifestyle factors remain important for longevity even at very advanced ages.

These studies collectively indicate that lifestyle factors continue to play a significant role in longevity even after age 80.