Comment by grapheneos

In the context of GrapheneOS, ROM means read-only memory. GrapheneOS does security research on hardware and firmware where the term ROM is useful and very relevant to security. There are multiple ROMs used on devices including the boot ROM loading, verifying and running the SoC boot firmware from the SSD.

Most people aren't exposed to the Android modding communities where the term ROM is used to mean Android-based OS. It's confusing to the general public including technical people. It misleads people about what it is and directly leads to misconceptions which we keep needing to address. It's best to avoid using inaccurate terminology which creates unnecessary misconceptions. There isn't a good reason to insist on using it. We would appreciate if Roblox fixed their documentation to avoid using it.