Given that the name was noted as being used or very similar to other jutsu by the Uzumaki in this fic, I will assume that every village has some version of the shadow clone but the fully autonomous with memory feedback functions are specific to the version Tobirama made.
They could be less Naruto shadow clones and more like the basic clone or a clone made from shadows. Good for use at night. Not so much during the day. It sounds like they could have had a few types that all fall under it. The memory feedback and able to do other stuff without direction? That'd mean it needs a proper name though! How else would you know what we are talking about?
To be fair the everybody he mentioned are his parents who likely have abnormally high standards and him assuming that his parent's standards are normal.
He has also been chatting with the Toad Sage and Mio now. I'm taking it not that they have very high standards. I'm taking it that this is just what everyone with actual sealing experience says the standards are. I would be fine if the kids were wow you can do storage seals, but it was about food over weapons/items.
It's like what's taught in the academy might only teach how to do weapons and items due to a lack of teachers or few students. It might be a field where any good students are taught if only to make sure the knowledge/skills are passed on. Too damn few do it and anyone that has some basics is called a seal master by others.