Also haven't seen it, but I could imagine it happening if someone desperately misses duck-typing due to too many similar classes not under their control (can't

Also haven't seen it, but I could imagine it happening if someone desperately misses duck-typing due to too many similar classes not under their control (can't make them share interfaces) and they have a lot of routine with e.g. json from/to but none with reflection. (I do enjoy a hearty dose of tojson in my println debugging)