Improve output units of spectral models #1979
Like I said in the call today, I don't feel this is a good solution, because it's hard to maintain. Likely there are parameter names in Gammapy or in user models that don't match this hard-coded list. And also there will probably be other models (e.g. background models) where a similar fix is needed.
I don't have a clear proposal / opinion yet how unit handling in model
I would close this PR, and defer #869 with a comment, because it's not really well-resolved yet. But @adonath - if you want to merge this and / or close #869 to have fewer open issue, fine, as you prefer.