The thing is, you won't find any information about when to expect the next chapter, even if you look through all the latest dev logs.
Ocean, unfortunately, is not famous for his strict update schedule and precise release dates.
Last year he gave some ETAs, according to which the first season of SG should have been ready in January-February of this year. Actually it was released on Steam on May 10, on other platforms later. There are a lot of reasons why it happened, both objective and underestimation of various circumstances that were out of Ocean's control.
Anyway, although he was very transparent with the audience about the difficulties and delays, from January to May he was subjected to a continuous flood of shit from noble consumers from the Zone who are entitled to get their release on time!
Reflecting on this experience, he has decided to no longer publish any progress metrics (he used to occasionally post the number of renders completed and the estimated total number of renders in an update) or release dates.
So for all we know: "I'm about to finish a rather big scene with Katie... Another one with Leia is almost done... Yeah, it's still going to take a while. It's almost two updates at once."
Go figure. The last update took about a year, the current one is planned to be twice as big as the last one, but he got new hardware and optimized his workflow so he could work on multiple scenes at once. He also finished the SG rework, which was stealing a significant amount of development time from both games. He also wrote in the SG dev log that he felt very energetic lately, which increased his productivity, but in another log he mentioned that he was constantly coming up with new things and testing them. So all that's left is to integrate all these factors, simulate it with Monte Carlo, and get a rough estimate of when the Chapter 4 is ready.