I've been flattered by all the #ScalaThankYou messages this week, but they've revealed to me that there are many more people than I realised quietly using Magnolia for generic derivation! If you're using it and I might not know you are, please let me know so I can compile a list!
That's fantastic to hear! (I hope the "hardness" is inherently due to the problem, rather than anything to do with Magnolia, though...)