Technical writers and researchers often use org-mode for its superior outlining and code execution features but need Markdown for publishing. A focused tool that converts between these formats while preserving structure would save hours.
Build a CLI tool or web service that handles complex conversions (tables, code blocks, metadata) with minimal configuration. Charge researchers and technical teams who value workflow efficiency.
The MVP could be a simple web form with a GitHub API for file conversion. The biggest risk is existing solutions like Pandoc being 'good enough' for most users.