Onion services never came in my mind tbh, but I think the core problem with onion services is the same with most NAS products and self hosting services out there. Most of the average consumers don't know what Onion services are, plus the technical knowledge barrier is still there, which is the main reason average consumers don't adopt self hosting. Which leaves us with the main question again, which technical barrier has to be removed to make the average consumer even consider self hosting in the first place?