As pretty much everyone does, Obsidian is a catch-all for all my thoughts. Using the iCloud Sync, I can take my notes with me without feeling tied to a specific platform. It's creative freedom at its best.
In the age of Obsidian, Byword is still a great markdown editor that is stripped down to the ultimate core needs for a user that just wants to focus on writing. Created ages ago, but still incredibly relevant today.