In the case of the SOD1 mutation present within Tucker's family, the average age of disease onset is 49.7 years old, with a variance of 12.3 years. There are cases of ALS developing in the teens or 20s, as well as cases of ALS developing in the 60s or later. Hwoever, on average, the age of onset for familial ALS is significantly younger than sporadic ALS.
You can "Buy Time" for Tucker and others by helping fund viable treatments and ideally, a cure, by making a donation to the Olson ALS Foundation.
The Olson ALS Foundation is a 501(c)(3) charity dedicated to assisting worldwide efforts of organizations, affiliates, and families to raise funds for research to advance treatments and a cure for ALS. All funds donated to the Olson ALS Foundation are allocated to research and donations are tax-deductible.