It seems like https://dlang.org/phobos/std_experimental_logger.html is now implemented and
its only job now is to point to https://dlang.org/phobos/std_logger.html
I wouldn't write this thread if it wasn't annoying to have this duplicity in the library reference. It wastes your attention and time.
The above image shows problem: when you open std Phobos Library Reference, first thing you see is experimental logger, you click it only to be greeted with a link to stable logger. Which is way below the experimental in the hierarchy of library reference.
My thought: I think https://dlang.org/phobos/std_experimental_logger.html should be archived/deleted.
Bonus idea: separate std experimental from std
Separating stable and experimental features would reduce confusion and allows for more efficient reference browsing.