Not to be a Debbie Downer but a lot of their advice is akin to the people who use gear.
You want to live to 100+? Find a way to make your DNA top of the line for longevity and resistant to damage. Whether that's supplements, therapies, hyperbaric chamber (HBOT) procedures, some new age exercise, etc.
Some of those therapies are coming. We can do epigenetic rejuvenation. There's now proof in mice/rats you can reverse cell age to its pluripotent state without triggering cancer. We can also do thymic rejuvenation which seems to improve health(TRIIM-/X).