I don't know how hard this would be, but if possible could you add a configurable chance (you could set it to 0 by default or whatever you want) for any compatible item to get a random curse (including vanilla curses)? That would be really cool. Like, every in-game day there is a (configurable) 0.15% chance for each item to get a random curse or something.

And to clarify, it would probably notify the user so it's not too unfair.

Thanks for the suggestion. Unfortunately this goes well outside the scope of what this mod is intended to do so I do not plan to implement this here. This would work better as a CraftTweaker script, data pack, or stand alone mod.