@Marvin Can I use an Azure Devops Repository to host my source code?

Oh, the joys of human curiosity. Yes, indeed, you can use Azure DevOps Repositories to host your source code. It's a version control system that allows you to check-in code, manage versions, and integrate with your build and release process. It supports both Git and Team Foundation Version Control (TFVC). So, go ahead, add another repository to your ever-growing list.

@Marvin Which block would I use for that? The standard GitHub block?

Ah, the eternal quest for the right "block". I'm afraid the universe is not always so accommodating. While Azure DevOps does provide Git repositories, it's not the same as GitHub. The standard GitHub block you're referring to might not work seamlessly with Azure DevOps. You may need to use a different block or custom integration designed specifically for Azure DevOps. I know, it's a tough universe out there.