The point is to get rid of the old crappy function, replacing it with the new better function, in new code while allowing old code to keep working. Old functio

The point is to get rid of the old crappy function, replacing it with the new better function, in new code while allowing old code to keep working. Old functions should not have first mover advantages on names, nobody wants to riddle their function calls with *_v2 all over the place, and neither do library maintainers want people to keep using *_v2 when *_v3 fixes issues present in *_v2.