[Feature Request]: Modern model/runtime compatibility roadmap (FLUX/SDXL/SD3 + VRAM-efficient pipelines)

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Is there an existing issue for this?

• I have searched the existing issues and checked the recent builds/commits

What would your feature do ?

WebUI is still a top entry point, but current user demand has shifted toward multi-runtime workflows (SDXL, SD3-family, FLUX variants), stronger LoRA ergonomics, and lower-VRAM usability. A clearer compatibility and optimization layer would reduce setup friction and keep WebUI competitive for mainstream users.

Proposed workflow

1. Add a runtime capability panel in settings/UI to show model-family compatibility (SD1.5/SDXL/SD3/FLUX), supported samplers, and known constraints.
2. Add guided optimization profiles (Low VRAM / Balanced / Max Quality) that configure attention/memory options safely.
3. Add LoRA manager improvements: conflict hints, weight presets, per-family compatibility warnings.
4. Add a benchmark command/report for startup diagnostics (VRAM, backend, expected throughput).
5. Publish/maintain a first-class compatibility matrix page generated from tested configs.

Additional information

Related trend signals:

• Rising adoption of FLUX-oriented and SDXL-heavy workflows
• Growing expectation for low-VRAM presets and reproducible setup paths
• Community confusion around model/runtime combinations and extension compatibility

If useful, I can help with a docs-first PR: compatibility matrix + optimization profiles draft.