"These plant-based fats could help you live longer"
medicalnewstoday.com/articl...
If you look at the research it is comparing life expectancy of saturated fats with poly-unsaturated fats. What it is concluding is that if you replace saturated with polyunsaturated then your life expectancy improves.
This research says nothing, as far as I can see, about whether removing poly-unsaturated yields even further life expectancy.