Just to be clear: We don’t know how many 100-hour weeks, but the article says they’ve done them multiple times throughout 2018. And it seems a safe bet that they’re not doing 40s the rest of the time.
The company has also said in the past: “There is simply no way Rockstar could continue to produce such large scale, high quality games without this.” That’s not a “whoops, we miscalculated a bit on this one project!” That’s cultural.