I remember that time long ago as well. The funny thing is: SG was the first game I noticed that had an expected 12+ month development cycle between updates - well above the average. This was shortly after Ocean reworked Ch 1.
As you say, that kind of development cycle (8-12+ months) is normalized now, but back then it was rare.
Yet there still are devs with established games that offer small and consistent monthly updates. A newish dev even made the brilliant decision to render their new game at 720p and they want (and have the ability) to turn out an update every a few months.
PS - anyone remember the most clichéd goals on Patreon - AVN devs would put a monthly $$ target as a goal that, when reached, would allow them to buy this and that to speed up development. Their ultimate monthly $$ target tier had a goal that, when reached, would enable them to quit there job and work on game development full time. LOL!