I was importing my Day One journal into Bear as a backup and a way to link journal entries to book and knowledge notes already in Bear. I kept having database issues with notes disappearing from the sidebar and searches (see this post), so I moved my ~5,000 journal entries from Bear to Obsidian. I deleted these from Bear and re-imported them from Day One using an Obsidian plug-in. I thought the poor sync performance would be a lot faster with fewer notes, but I’ve seen no improvement.
I’m in the middle of a test to see if Obsidian can replace Bear. The jury is still out, but I will say that Obsidian Sync is 20X faster than Bear.