I moved to Obsidian after Evernote increased their subscription prices beyond the point I could justify and I think Obsidian is heading down the same path Evernote did. They keep adding more and more features to it when I wish they would call it complete and move it into maintenance mode.
For me, the turning point for Obsidian was their Canvas feature. That was a big move beyond the initial design of it being an excellent editor for a directory or markdown files that supported links and all the other cool things you can do with a basic directory of files and a few conventions. Nothing proprietary, nothing much beyond the directory of files aside from a preferences store. IMHO, Canvas and beyond should have been a new product.
If Obsidian was open source I would have been tempted to fork it at that point.
Joplin is open source but isn't half of Obsidian, it's slow and grouchy, a fairly poor Electron app, but at least I can turn off the plugin that does freehand drawing. It's also has self-hosted sync for free. If Obsidian was open source, I'd have switched already even if it needed a subscription to sync, especially if I could toggle off unwanted features.
For me, the turning point for Obsidian was their Canvas feature. That was a big move beyond the initial design of it being an excellent editor for a directory or markdown files that supported links and all the other cool things you can do with a basic directory of files and a few conventions. Nothing proprietary, nothing much beyond the directory of files aside from a preferences store. IMHO, Canvas and beyond should have been a new product.
If Obsidian was open source I would have been tempted to fork it at that point.