We apparently were a lot closer techologiocally in the period prior to WWII than the general public perceived
SENS-like platforms would indicate that we may be a lot closer to radically intervening in the aging process than the general public perceives.
The theoretical aspects of nuclear weapons really begin to be seriously modeled in the 1920's and the basic tech dated back years earlier almost to the late 19th century. As for the moon race again there was a political drive that coincides with tech that in many cases dates back to the mid 19th century.
SENS, as outlined by de Grey's proposals from a couple years ago, depended on technology either already available or in the pipeline and foreseen to be completed (in a rough, but functional version)
before the timeframe for RMR, i.e. a decade or so. The possible exception, WILT, seems to me to be a human-only intervention anyway, thus allowing 20-25 years for development of the underlying technologies of the WILT scaffolding. While FDA-approvable, market-ready versions of all these technologies would require years of refinements, this as well is acceptable, because it would take years to translate results in mice to humans anyway.
The technology is there, or it will be. But we need the research, the "deliverables" to match the delivery mechanisms that will be developed well within the 25-year window de Grey proposes.
All that's missing is the will to try, and the subsequent funding. In a word (an acronym, really), PR.