Cause Reasons.
Bascialy Either he MEANS 200 years TO THE SECOND and hes thinking this whole thing is a lot of notheing because who realy cares its just a game. . .
or hes being approximate becase hey Todd is not saying the exact time to the Exact Second and its Todd's game and not his after all...
Prydwen may have nothing to do with the DC BOS and just be a general BOS thing.
The problem is we are already 200+ years after the bomb fell. We are long past the "Beyond ridiculous" stage of how things are in the wasteland. (seriously those dead forests should have gone up long ago in a forest fire, ditto for most wood construction, and yes I know all about that petrified forest thing last month, Those trees were "preserved" by being burred at the time of the Eruption, NOT 200+ YEARS LATER) (and realize petrified trees are technically fossils and not wood anymore to begin with)
To be blunt Given the fallout world if they set each new chapter in a different part of the country you can cover the US for years and only need to advance the story a few months at a time.
Heck I would love to see a story set in say St Louis with three parts, first chapter pre-war up to the final run to the vault, second chapter in the vault and third chapter outside the vault after the war.