That's insane! I 'm actually working on a lite-daw for web, so this is extremely interesting to me. However I do not plan to go very far. My angle is that this should be a tool to experiment and try out things with minimal friction, then for any serious work, perhaps users can look into professional solutions. Perhaps also take advantage of the web's collaborative nature and have multiple users share a session!
There are decades of research, feedback loops and work put into tools such as FruityLoops, Cubase, ProTools etc, and the thought of reimplementing parts of it for web is such a daunting task.
Multiplayer would be sweet for a web DAW, it rocks in design tools like Figma.
I think you are right, a light DAW would cover 80% of people's needs. And as long as you can export the track as midi and audio bounces, you could always continue it in a native DAW.
I would love to collab if you need UI/UX for this btw? I've worked on audio and DAW stuff for a long time, as well as open source. What's the best way to reach?
Saw something like that but for synths - https://www.webaudiomodules.org/wamsynths/