I don't know why you're talking about Apollo hardware and software. The programmers and engineers who wrote that stuff did it from well known scientific and engineering principles. They didn't have to start with a previous moon mission. The scientific and engineering principles are even better known today, and we have much more experience for space flight.

The only advantage you'd have with Apollo era stuff is that it has been tested and the bugs are well known. But, so what? Any modern mission to the moon would start from first principles again, not by trying to extend the Apollo stuff.