People with other boards can update normally. Note that there is no risk of this with BIOS updates for MSI mainboards using other chipsets (like Z390, B460, Z590, B560, Z690, B660, X470, B450, X570, B550, and so on). The danger has first appeared with the April/May 2021 BIOS update (changelog: 'Improved Audio compatibility'), and may continue with newer updates as well, potentially causing the same issue: The board can become unusable / 'bricked' because of a failed flash process.
There is a common problem with the latest BIOS updates for Z490 boards: The update seems to finish, the PC reboots, but then it's stuck with the EZ Debug LED 'CPU' being on.