Just a quick announcement that the Typing Documentation has now moved from typing.readthedocs.io to typing.python.org. Readthedocs is still used under the hood, and the old URLs redirect to the new ones, but please update any links to the new canonical location.
Thanks to @hugovk for the original suggestion and to @Jelle, @JacobCoffee, and @EWDurbin for making it happen!