This option has the advantage of being efficient for the software, as it eliminates the need for the device to retain – separate from the persistent file – the operating-system’s installer software.
ðɪs ˈɑːpʃən hɐz ðɪ ɐdvˈæntɪdʒ ʌv bˌiːɪŋ ɪfˈɪʃənt fɚðə sˈɔftwɛɹ, æz ɪɾ ᵻlˈɪmᵻnˌeɪts ðə nˈiːd fɚðə dɪvˈaɪs tə ɹᵻtˈeɪn sˈɛpɹət fɹʌmðə pɚsˈɪstənt fˈaɪl ðɪ ˈɑːpɚɹˌeɪɾɪŋsˈɪstəmz ɪnstˈɔːlɚ sˈɔftwɛɹ.