Before Microsoft acquired GitHub, they hosted code on a website named CodePlex and it was a popular platform for .NET projects. As you can see when you visit the CodePlex page, Microsoft put the website into archive mode and is planning to shut down this service entirely on 2021-07-01 because GitHub is their preferred platform to host code.
As a result, tons and tons of old C#/WPF/.NET related questions and answers will contain dead links pointing to archived CodePlex projects that may or may not have been migrated elsewhere. Popular CodePlex repositories are MVVM Light and Silverlight for WPF, but there's also Sandcastle for automatically generating .NET code documentation.
As you can see, some CodePlex projects show a prompt saying the project migrated, while others don't. I was wondering if anyone's been cleaning up URLs pointing to CodePlex or perhaps updating them with the information available on the archived project website. If not, would this not be a pretty important maintenance operation?
On the one hand, you could say that even the "newest" CodePlex projects are already four years old, and can/should be considered outdated, but one the other hand there's still projects from back in those days that are actively being maintained today elsewhere.
What will Stack Overflow do?