Will Apple ever restore the more functional Guest account even when FileVault is enabled?

Will Apple ever restore the more functional Guest account even when FileVault is enabled? Without the ability to use files or other apps (even if they are only the ones I downloaded and created in the single session), the Guest Account functionality is severely crippled compared to what it used to be. Can’t Apple give me the option to dedicate a 20GB volume to the Guest account? It can even be encrypted without its key ever being persisted in order to protect the user from accidentally consuming poisonous files the guest user placed on their volume.