Not true, OrbStack uses Virtualization.framework: https://news.ycombinator.com/item?id=36189550

OrbStack is great but it is solving a different problem. it's a full Docker Desktop replacement. shuru is just a thin layer over Virtualization.framework for spinning up throwaway sandboxes.

OrbStack has some invasive elements inside it trying to provide filesystem integration, and the filesystem they use is not POSIX compliant and causes breakage with some build systems and other software.