tl;dr: Asahi Linux devs are working around Apple Silicon quirks, including using UEFI Runtime Services as a novel PSCI conduit for CPU power management (since Apple cores lack EL3), and reverse-engineering Apple's Secure Page Table Monitor (SPTM) to keep the m1n1 hypervisor functional on M4+ chips. Significant progress was made on M3 support (webcam, mics, USB3/Thunderbolt via the new ACE3 controller), early M4/M5 bringup (NVMe, PCIe), and hardware video decoding via AVD with a VA-API translation layer. Direct scanout using Apple's Interchange framebuffer format is now wired up, pending compositor support.