Diffusers 0.33.0: Wan2.1 pipelines, FP8 layerwise casting, and group offloading

AI Impact Summary

Diffusers 0.33.0 introduces Wan2.1 video pipelines and multiple new image-generation models, alongside memory- and performance-oriented features such as FP8 layerwise casting and group offloading. The deprecation tag implies older Diffusers pipelines or API variants will be retired, so teams should migrate to Wan2.1-T2V/I2V models and adopt the new memory-optimized execution paths to meet VRAM and CPU RAM constraints. The release provides concrete guidance with examples around CogVideoX pipelines, highlighting how to enable storage_dtype FP8 casting and configure offload devices and CUDA streams to balance throughput and memory usage. This will affect engineering teams maintaining production pipelines that rely on older Diffusers workflows and models.