1. It doesn't seem to me that we need more words to describe this feature, but any of us can add some words.
2. I'm not suggesting an idea, but a feature available in other software.
It feels stupid to not do what we've done for years with other software: link a field to any number of records from any number of tables (without copying ("synchronising") any table to another box).
3. I don't want to use this software for these conversations, but AirTable.