I think Obsidian is an interesting case. It is highly customisable and it allows for Claude code and other agents to run inside it, with access to both the app data and the code. So all within Obsidian, you can tell Claude to change anything about Obsidian, and he will do it and you will see the changes almost instantly. So basically everyone starts when the default obsidian build but each user ends up having a different set of UI, workflows and extensions to fit their needs