To be complete from my imagining in this. Yes, if I had decided on a ‘nothing’ value e.g. ‘unknown’, I could have done so - respectively. My use case is converging on unassigned/blank. And to @cgrunenberg’s points. A default is not in the offing but , sooner, querying after an empty value. That’s already quite some power.
There may yet be some craft to be learned under current constraints