The critical issue I've always had with OSM-based map apps has been stale data. If I were to update something on OSM, then how long could I reasonably expect it to take for that change to make it onto my phone with Organic Maps? And would it happen automatically in the background while I'm on WiFi, or would I have to do something manually?
Automatic updates are planned https://github.com/organicmaps/organicmaps/issues/5679