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Re:Nvim-colorizer.lua: The fastest colorizer for neovim (and... by coldtea on Friday October 18, 2019 @08:42AM (#21290874)
True, the environment change was a big one.

But otherwise many codebases do move up Lua versions (outside of LuaJit), it's not a Python 3 "wait 10 years", Perl 6 "Wait 20 years" situation/

Re:Nvim-colorizer.lua: The fastest colorizer for neovim (and... by lifthrasiir on Friday October 18, 2019 @10:44AM (#21291794)
Python 2.7 was supported for a decade, providing a reasonable environment when Python 3 was not really matured enough. And while it didn't work, Python 3 tried to provide the migration path.

Perl 6 requires the full p5 compatibility as far as I recall. It was designed to coexist.

Lua only provides some C preprocessor flags for partial backward compatibility.