He wrote the numbers
600-800 renders per month, 6000-7000 renders in total, 2000 of which are done. So let's take the average of 700 renders per month and 6500-2000=4500 renders left to do, which gives us about 6.5 months to render this amount. And then there's post-processing and cinematics.
I don't want to say anything about it, 700 renders per month is insane performance, there are developers who produce that much in a year and are still quite popular and have a thousand subscribers. And that's without even comparing the quality of Ocean's renders with them.
But it would still be better if he divided this chapter into two parts. A year is somewhat bearable, according to the amount of the content delivered. But a year and a half or more is too long to wait.