darklua

Only targets Lua 5.1 and Luau, excluding newer versions like Lua 5.2 or 5.3, which may hinder adoption in projects using those versions.

Setting up custom rules requires learning the rule syntax and may involve trial-and-error, as the tool lacks pre-configured, out-of-the-box rule sets for common standards.

As a niche tool, it has a smaller community and fewer shared rule templates compared to established code formatters in other languages, potentially increasing setup time.

Version 0.18.0 indicates it's still in development (pre-1.0.0), so APIs and configurations might change frequently, risking instability in long-term projects.