Other research reveals that the lifespan of Homo sapiens may have changed from the Middle Paleolithic to the later Upper Paleolithic, since the ratio of older to younger remains increases. The same research shows that starting about 30,000 years ago at the beginning of the Upper Paleolithic, the average lifespan began to push past 30 years.
So 30000 years ago 30 years was pretty much the maximum age a person could achieve.
Life expectancy would probably have been more around 15.
That is completely wrong.
Lifespan is NOT the same as life expectancy:
https://my.clevelandclinic.org/health/articles/lifespan
https://www.discovermagazine.com/what-was-the-life-expectancy-of-ancient-humans-44847
So 30000 years ago 30 years was pretty much the maximum age a person could achieve. Life expectancy would probably have been more around 15.
Read my other comment, the study is probably pretty close to the truth.
https://lemmy.world/comment/19682894