When should I use

val scope = SupervisorScope()

over

val scope = CoroutineScope(CoroutineExceptionHandler { ctx, e -> })

?

When an exception is thrown but not caught by a child-Coroutine in a scope with a supervisor job (SupervisorScope), its other child Coroutines keep running and the scope remains active. Using a 'regular' scope with a CEH or not, the scope its Job and all its child-Coroutines will finish when one of its child-Coroutines throws but not catch an exception.

Yeah I thought as much.