Dell Command Update Universal 2024. It's still listed in the dell command | update version 4.x reference guide as a supported option for /configure, but it's not listed below as a cli option. You can use dell command | update to update a dell system with the latest drivers, bios, firmware, and dell software applications.
Supportassist/dell update is useful if you are setting up a blank computer. Bios is a firmware package that is embedded on a small memory chip on the system board.