Just did a big rewrite of a docs page on dynamic identity providers in Duende #identityserver.
That was fun to dive in, and makes me appreciate the thought put in to designing both #aspnetcore and IdentityServer itself.
https://docs.duendesoftware.com/identityserver/ui/login/dynamicproviders/
(also big thanks to @khalidabuhakmeh for the fantastic preview images on new docs pages)