In 2019, I purchased the 2019 stand-alone version for Mac.
Then, in 2021 I purchased the "new" 2021 stand-alone version for Mac. However, that "new" 2021 version was the exact same version number as the 2019 version. Microsoft simply rebadged the same software. Very sneaky and disappointing.
Fortunately, Microsoft offered an immediate refund when I called them out on it.
So - my advice - be wary that the "new" 2024 version is not simply the 2021 (and 2019!) version that has been rebadged. For anyone that buys the (potentially new, potentially not) 2024 version, please note the current 2019/2021 version is 16.89.1.