I use Sublime Text as a simple note taking app (love the speed and tabs). Didn't know about Obsidian and was exited to try it after reading about it today, but the simple fact that Obsidian loads a fraction of a second slower than Sublime, may be a deal breaker for me.
Here I recorded a comparison https://imgur.com/a/6QzpwYw
Will give it a chance, looks so good and has several interesting features that I may didn't know that I needed. Kudos to the Obsidian team.