Would you actually buy an add-on like this? Looking for honest feedback.

Hi everyone,
I’m currently developing a Blender add-on and I’d love some honest feedback before I spend months building it.
The idea is a real-time outline system that generates clean outlines directly on the surface of meshes without creating extra geometry (not Grease Pencil). The goal is to provide a workflow that’s much faster and lighter than using Grease Pencil for creating object outlines, while producing clean technical, concept-art, and illustration-style results.
Some features I have included:
Adjustable outline thickness and style.
Material/object-based control over which objects receive outlines.
Surface-drawn outlines instead of screen-space-only effects.
A simple, non-destructive workflow that integrates naturally into Blender.
I’d love your honest thoughts:
Would this solve a problem you actually have?
Is this something you’d consider paying for? If so, what price range feels reasonable?
What features would make it significantly more valuable?
Are there existing add-ons that already do this well enough?
If you wouldn’t buy it, why not?
I’m looking for completely honest feedback—positive or negative. I’d rather know now than after months of development. Thanks!