* localStorage is small, volatile, OPFS is big/durable

* main thread <-> db vs main thread <-> worker <-> db:

  - firstly, sqlite with OPFS has to run in a webworker

  - even if it was possible to run in main thread, this approach allows for a code structure that is similar to a traditional architecture (frontend/backend split) and it's easy to route some request to the web worker while let over request fall through and reach backend server and not needing to worry about that in the "frontend code"