You should checkout the Haiku operating system; some source files in there are outdated and haven't been touched in 20 years, but other than that, it is serious

You should checkout the Haiku operating system; some source files in there are outdated and haven't been touched in 20 years, but other than that, it is seriously very consistent and even eye-candy-ish. https://github.com/haiku/haiku https://github.com/haiku/haiku