I also don't quite get what the point is...
it is not a problem, that people don't get it. But unnecessary to post it.
And what is the reason, that people ask, how far "we" are from using this service also as upstrem?
Can these people outline, what was their contribution?
Have they payed people to develop uplink software? Have they invested in hardware to create an uplink channel? Have they tried to reflect, what it needs, to get un uplink up and running? Have they even read the documentation and intention of this blockchain distribution channel?
The answer must be "no".
And yes, with a very little bit of imagination one could think about creatng a tx and bring it to a service like blockchain.info, which uploads to the blockchain. An SMS, a letter, a file, and other options come to mind.
Come on people, go beyond your barriers and limitations, and proof, that the complaints here are only preps for
your next extension in the wonderful crypto world.