I thought about it when choosing a streamer but really don't want another subscription. In the end I picked an Aurender N200. It checked all the boxes for me and I think after using it it was definitely the right choice coming from a Vault, which I still use. I can actually pull ripped content from the Vault to the Aurender over the network . So for me a closed ecosystem is best . If I need music in another room I will just move the Vault over there .
I can definitely see the appeal of Roon. Just not for me