What are your thoughts on building a fully functional media editor in the browser?

A developer recently shared their journey of creating a browser-based video editor that doesn't rely on cloud backends. They integrated various workflows from tools like Adobe and Ableton, focusing on real-time performance using the user's GPU. The project has evolved to include 3D capabilities, a full audio editor, and AI-generated content handling. What are your thoughts on such ambitious projects? Have you worked on similar tools or faced challenges in full stack development? Share your experiences!