Is anyone reminded by this as kind of a smalltalk image?

I mean an environment that is self contained and can be modified?

I wished the authors would think of aspects like that: how to modify the system without restarting it or needing separate tools.

Sure it looks nice but in the end its a browser with some javascript libs glued together with sqllite or something?

Customization seems way to difficult , so the tool can do a bit of tiny things that seem nice for me but so many things that I don't need. The GUI seems very bloated for me.

Is this just me? Or are people generally happy with such GUIs?