I think we should try to stick to Scala standard library syntax, semantics and terminology. Think lists of case classes:
```
case class Person(name: String)
val people = List(Person("Chris"),Person("Stefan"))
people.map( t => t.name.stringAgg(",") ) // <- that doesn't make sense, unless maybe you aim for List("C,h,r,i,s","S,t,e,f,a,n")
people.map(_.name).mkString(",") // <- that does make sense and yields "Chris,Stefan"
```