Lenses are not fancy or complicated. They require no language extensions to create or use at all. Heck, it require no libraries beyond base to create lenses for

Lenses are not fancy or complicated. They require no language extensions to create or use at all. Heck, it require no libraries beyond base to create lenses for others to use. There's a bit to learn, but there's nothing fancy. It's just a matter of applying a simple pattern repeatedly. (Or doing some software engineering and letting a library do the repetition for you.)