[jdjdjjsjs]

That sounds really strange to me. Even amongst major vim users and proponents I have never heard anyone say vimscript is good.

Maybe I don't get out enough.

[Seirdy]

Vimscript is good for setting simple configurations, but bad for large/complex software.

The Neovim team found that Lua seems to do both pretty well and has a fast implementation (LuaJIT), so they're trying to get Lua to be Neovim's primary extension language. Python and Javascript also seem to be popular languages for Neovim extensions.