Slightly different take: OSS is the second thing I check. The first one is data export. If it's a closed component that still generates value and I can capture

Slightly different take: OSS is the second thing I check. The first one is data export. If it's a closed component that still generates value and I can capture that value via export, OSS becomes a tie-breaker between otherwise equivalent tools. Obsidian is an editor on top of a bunch of markdown files. If they go away, meh. The world is not running out of Markdown text editors. Sync is an add-on feature, so I can sidestep potential privacy concerns there. A working system always beats waiting for a perfect system.