With nukes being still fairly new, I cannot see that a module with the amount of features that coppermine has, can be made without years of development.
After all coppermine has been developed for years.
I might be wrong however, and a I do presume basic albums exists.
I have over time written several basic albums myself, using different technologies, untill i found coppermine, and realised I would never get close to it...
Hopefully someone will spend some months writing a conversion, and fixing the multiple groups issue as well.