This illustrates my point perfectly. Theoretical refactoring or optimizations are just hypothetical situations that may or may not occur. Needing to proliferate

This illustrates my point perfectly. Theoretical refactoring or optimizations are just hypothetical situations that may or may not occur. Needing to proliferate a function color incurs a real cost in terms of development efficiency. You should get something concrete if you pay the price. Until that happens, such language features are unlikely to gain widespread popularity.