We could. There will be a limited number of actors able to finance such a service, however.

If I may make a suggestion, we could run the model in the client, using notes already downloaded.

Default topic model downloaded on first run, or be bundled with app (~50 MB).

Menu of topic models somewhere in settings:

- L.I.V's Mad Science Topic Model

- Leserin's Overthinking Everyday Topic Model

- Onyx's I Know What Boys Like topic model

Etc.

Building a model is less of a commitment than hosting one, and the processing is offloaded to the client instead of angel funding or whatever