North American Sinea ID and the Sorcerer's Apprentice problem

I feel like the instructions in situations like this can often be something relatively simple like “identification is obvious in the eastern part of the range but impossible in the western part of the range”, which can easily be included in an ID comment on every observation. Often the exact geographic limits of identifiability will be a bit ambiguous, maybe some other nuances in some cases (e.g. most midges are impossible, while a handful are possible but very difficult). But it’s less interesting ID work than situations involving multiple challenging-but-possible species, which are more engaging for identifiers and can be more or less “sorted out” once effort was applied rather than the feedback loops we get here. Not to say that having more ID info out there and more people helping wouldn’t be useful.