This product looks awesome and the mobile app looks exceptional. But if it’s not self-hosted and in some kind of standard format,you’re SOL when the company shuts down. Even though you can export your data, where are you supposed import it to?
Trust me, I do understand all that. My personal set of trade-offs is such that I really can't be bothered with self-hosting.
Capacities has one-click export of all of your objects (notes/pages) with a sensible folder structure that produces markdown with frontmatter and includes all media attachments. That's good enough for me.