My first game was actually set in the 2040s. Cyber wasn't very common yet, and it had a very hardboiled
roaring twenties feel to it, but that was a lot of GM interpretation.
As far as taking them all the way through SR, it is a tall order, but can be done. I did that to a group in 3rd
from 2050 - 2063(which was much easier to transfer stats to) and they loved it. None of the characters
were the same throughout the story (Some retired, several died, and a few became mindless infected/spirit fodder),
but their main Fixer was always the same.
The WOTC study if I remember it correctly, compared all age groups as the same, so if you're an adult playing
with a group of adults, you can usually expect quite a bit longer than 11 months. The main factor in the 11 month
time frame was that WOTC games that they studied (D20 D&D for the most part) have a much larger presence
of youths and young adults playing that are still tied to college and high school. It is very common for such groups
to filter out quickly, because every year someone graduates/drops out/goes to jail. I've found 2 years to be much closer
to average in my time gaming, but then again maybe I'm at the good side of the bell curve (and I don't feel like getting
D20 Cancer).