Your idea sounds awesome and I hope I'll hear more about it soon.

> I'm sick of having to decide between using cloud software and using local software

However, I want to point out there's an additional option that is becoming more and more accessible in recent years and that is self-hosting, either on a local server or a rented VPS. Most cloud based applications have several self hosted equivalents at various stages of development.

Check out this list:

https://github.com/awesome-selfhosted/awesome-selfhosted

Possibly your project falls into the self hosted category in some way?