Yes, it's back now, thankfully.
Initially when OT came back empty, there was
a thread where you could request the restoration of a particular thread, if you could provide a link to the thread that you wanted back (or a good enough description that a mod could find it). I give credit that they offered this at all initially, but it didn't go far enough.
A petition thread was started to bring back the entire OT, which eventually was granted on November 1st (the site originally went down on 10/22 and empty OT came back on 10/26 -- 6 days is a
long time in terms of letting people believe they were never getting old content back).
Knowing what we know now, I completely understand why they hid all of OT initially. There was a
lot of awful stuff that needed cleaning up. But none of that was communicated well at the time (there was a lot of radio silence).