How did I miss this? Giganews, the biggest Usenet provider out there by some margin, now has 800 days of binary retention. A year and a half ago I wrote a similar story, but the number was 365 days of retention. Man, I remember the days when I had two days of retention! Granted, it was an ISP-provided feed, but it worked just fine.
Giganews says that it’s “not stopping,” and that 800 days of retention—as ridiculous as that is—isn’t an artificial endpoint or anything.
They also note that the data from 800 days ago is stored on the same class of server as the data from today, so speed and data integrity won’t be an issue.