Previously discussed in 2022: https://news.ycombinator.com/item?id=32657709
Summary: Microsoft releases Visual Studio Code with telemetry built in, so other projects (e.g. VSCodium) have spun up to release custom builds without telemetry. But these projects can't use the same marketplace because they are not licensed by Microsoft, hence the "fracture" in the title of this article. It goes on to say that other proprietary IDEs are also problematic, and GitHub is a trap to capture and fracture developers.
This drama with Microsoft and open source reminds me of the Halloween documents: