[dtech]

Ah yes, the infamous volume-manager-that-you-have-to-adjust-with-a-text-field, I hate that thing.

According to you VIM isn't optimized for editing text. It uses a UI (terminal) that was designed for entering batch commands and displaying their output.

[Touche]

The terminal isn't a UI, and VIM doesn't use any UI toolkit, not even curses, but rather is completely custom. This enables it to specialize in text manipulation, whereas graphical editors like Sublime build on top of the OS-provided UI and keyboard conventions. Some prefer the latter because it is more "familiar", but personally I think the fact that VIM is its own thing is what makes it special.