I've read your twitter post. That makes sense. I've read a blog post or some kind forum thread in which it was said that the maintenance of Obsidian as an open source project would be an issue and some other similar statements. This was a while ago.

Some are OK with the use of a closed source note taking app. Perhaps an enterprise version with a different feature set might be useful to companies.

For notes written on my own computer, I use open source software to write and handle the sync myself.