announcements VS MonoDevelop

I don't think that works. That would alert you about the security alerts on the Security tab of the dotnet/announcements repo, which are empty, not about issues that contain information about .Net security issues.

.NET Core 2.0 Cryptography uses Apple Security Framework on macOS · Issue #21 · dotnet/announcements (github.com)

Yeah, it's a fun meme, but there have been a few nasty RCE vulnerabilities patched on .NET Core in the last couple years. Like this one: https://github.com/dotnet/announcements/issues/178

If you started receiving errors when pulling old versions of dotnet docker images (like the .NET 2.1), it's because Microsoft deleted them from Docker Hub on August 21st, 2021. That date is not a coincidence, the .NET Core 2.1 reached end of support in the same date. For more details take a look at the official dotnet announcement or also the dotnet blog. In my case, the error bellow was thrown in the stdout when pulling the microsoft/dotnet:2.2-aspnetcore-runtime image:

I'm not entirely sure what that means. We're done porting .NET Framework APIs to .NET Core / .NET 5. .NET Framework is what it is now, and .NET is moving forward with .NET 6+. If it is worth porting your code to .NET 6, it is. If not, then it isn't. Both can be good choices. .NET Core on Linux, however, is absolutely not preview.

An older version of the underlying source code remains available: https://github.com/mono/monodevelop

From what I understand MonoDevelop has been discontinued. Even their repo has been archived.

SharpDevelop and MonoDevelop are both dead and focused for devs which gives them different priority than apps targeted at non-devs, but they show how to put together seriously complex apps, and they're the ancestor of the Visual Studio for Mac.

Monodevelop

There are Linux binaries for MonoDevelop which is what VS for Mac is based on.

Using Visual Studio with Wine is not really possible. But you have other IDEs as options. You can pack Visual Studio Code with the needed plugins. You can use MonoDevelop which is the IDE from the Mono project https://www.monodevelop.com/. Something to add here, the Mono project is actually developed by Microsoft. And there is Jetbrains Rider, I personally use it every day at work and am kind of in love, but it costs you 139 € in the first year.