That's been true for a while. Singularity, CosmosOS, MOSA, SharpOS, just to name the ones I personally know of: https://www.microsoft.com/en-us/research/projec

That's been true for a while. Singularity, CosmosOS, MOSA, SharpOS, just to name the ones I personally know of: https://www.microsoft.com/en-us/research/project/singularity/ https://www.microsoft.com/en-us/research/project/singularity... (no more active development from Microsoft, but the source is Shared Source available) https://www.gocosmos.org/ https://www.gocosmos.org/ (still actively developed) https://github.com/mosa/MOSA-Project https://github.com/mosa/MOSA-Project (still actively developed) https://github.com/sharpos/SharpOS https://github.com/sharpos/SharpOS (seems defunct)