There were occasional reboots for a similar problem, which does build up over time.
I mean, a similar problem to the fog, as that’s a regular issue and not even a question any more - if the servers go 2 - 3 months with no restart they start fogging up.
The de-sync and rubber-banding becoming wide spread might be related, but it’s a less common issue. It’s been a long time since “wide spread rubber-banding” was an issue.
My memory is also foggy but I think it’s been only a few weeks (couple months) since the last time we got a restart for the fog.
EDIT: Not quite a month, for sure.