This supports the theory that red-avatars always say is false- that people get more Republican as they age.
Not necessarily. What this shows is that practically all of the R among the elderly from 2008-2016 must have come from the heavily Dem FDR generation passing away (age 80+ still voted more Dem than the nation as a whole in 2012) and being replaced by Lean Rep Baby Boomers aging into that group, not from changing anyone's mind.
If people inevitably get more conservative as they age, why was Bill Clinton's best age cohort seniors? A generational view says it's because they came of age with popular Democratic presidents leading us through the Depression and WWII.
This data does imply that people born after 1990 are not as Dem as 1982-1990, because the oldest generation will be drastically over represented in voting and they shifted right much less than the PV.