Funny because neovim supports LuaJIT for it's lua init files by default. I wonder if there would be a way to compile vimscript to lua and have it everything inside the lua IR. Probably very hard, given the DSL nature of vimscript
This was tried by ZyX-I when the Neovim project was started. AFAIK they managed to create an alternative parser for Vimscript, but the transpiler was never finished (or productionized?), I think due to incompatibilities that are hard to avoid. Some relevant issues: