Keep forgetting to post this here... finally got the "removal notice" from IRD in the mail.
The big one which will affect individuals (esp if you're leaving town..) is the Individuals Tax dept move. Old timers know where the airport used to be...A majority of the offices of Units/Sections of the Inland Revenue Department will be relocated to the new building by phases by late 2022/early 2023.
The Inland Revenue Centre is located at Kai Tak Development Area adjacent to the Trade and Industry Tower and MTR Kai Tak Station
https://www.ird.gov.hk/eng/abo/relocate.htm