I love Obsidian. I wish they would consider open sourcing the application. It doesn't even seem in conflict with their monetization plans, because they're already distributing the app for free, and making money with things like "Obsidian publish." They've got enough critical mass and a sufficiently thriving ecosystem of community plugins that they could only stand to benefit from open sourcing the core app.
See Mattermost for an example of a similarly positioned product that is fully open source.
See Mattermost for an example of a similarly positioned product that is fully open source.