If the statistical claim is true, that morality rates don't increase after 105, then it is "suggestive of the idea" that there isn't a structural limit to age, even if this doesn't in any way yield some immediate immortality (notice how weakly I phrase that). If the chance of dying is the same at 105 and 115, then maybe the things killing one at 105 and at 115 have the same root cause and heading them off could significantly increase lifespans. The alternative scenario is new things appear that would kill one at 115 but not at 105 but one would naively assume that the mortality increases (it may be old things retreat and new things appear however).

Obviously, there are a lot of "ifs" here but the result seems interesting and suggestive.