Also FAQ #4 worries me:
4. Will a member's status change to a lower tier if they haven’t achieved the new nights threshold? For example, will a member be downgraded to Silver Elite if they do not meet the new Gold Elite criteria?Yes, members will need to meet 2022 Qualified Nights or Points threshold for the relevant tier based on activity between 1 January 2022 and 31 December 2022 to maintain current status or achieve higher tier level. Otherwise, their status will be downgraded and reflected in their IHG One Rewards account in March 2023.

If I am downgraded to Platinum AMB would be a pity, as I was very close to the Diamond qualification threshold in 2022, but I did not make the efforts as my account shows that Diamond was extended to the end of 2023 (when I renewed AMB).