Assuming JuliaLang/julia#46453 gets merged at some point, Base will export functions insert and delete. This raises the question of what to do with Accessors.insert and delete? At least three possible alternatives:

• Keep as-is: separate functions with the same name. They'll need to be qualified then, and writing Accessors.delete(...) is pretty verbose.
• Add new methods to Base functions. The current convenience remains, with minor type piracy like delete(_, ::ComposedFunction). Hard to imagine something other than optics library defining this method anyway :)
• Change their names to something different. Hard to come up with similarly clean names. odelete?

I wonder if I'm missing others or their +/-.