It’s a fork of Vim but the codebase has been cleaned up to remove complexity due to legacy hardware support. It allows the use of Lua for configuration and plugin implementation instead of VimScript, which allows plugins to be written in a sanely designed, high performance scripting language, allowing plugin developers to build more complex plugins more easily without dragging down editor performance (VimScript comparability is maintained though). It has a built in implementation of LSP. Plugins written in other languages can communicate with the application via a msgpack API so deciding to support other programming languages for plugin development at compile time is not necessary.