Do you think this is true for AC, where it says that you'll get the status for the current and next calendar year? Or is this subject to keeping the card active the whole time?Yup, you'll probably get gold for the remainder of 2024 and 2025. I don't know how long it takes to get gold status but if you meet the minimum spend on the 90th day (18/12), you might not get the status credited until early January 2025 with luck...
(There's a lengthy thread on the other financial products thread.)