Just to make it clear: Since it looks like Ryzen AI 400 is just a rename of last year's Ryzen AI 300 (just like Phoenix to Hawk Point), as such, I expect Ryzen AI 300 APUs (will) have the same software level support as Ryzen AI 400.
Great news. Hopefully this fixes a lot of the issues. On Windows, it seems to be crashing on some workloads for image upscaling. Hopefully the Comfyui integration makes them fix the long VAE decoding times too. I wouldn't hope for much, but any improvement is sorely needed.
AMD has significantly improved the performance of its open source ROCm GPGPU software stack in version 7 across its hardware. ROCm v7.2 is now a common Linux and Windows release, supports the latest Ryzen AI 400 series APUs, and offers integrations with ComfyUI and Radeon Adrenalin 26.1.1.