Same here. And I still did not find the perfect note taking app. I have so few requirements. WYSIWYG editing, easy image insertion, export function with open standard format, mobile app, some security.
edit: To clarify, using they mobile app will require paid subscription in all scenarios, I think (not sure, as I don't need that).
Nope. They've said they'll support opening a folder on a phone. Therefore, as long as you sync the folder using some cloud software, the mobile app will work just fine.
But of course, you can pay them for the convenience and they'll sync them for you.