A couple of hundred lines of code is going always to be easy to maintain unless it's purposely written in an obfuscated and confusing style.
A project with only two maintainers in its lifetime isn't going to be subject to the kind of style meanderings that muck up a codebase that's gone through dozens of maintainers over its lifetime.
A couple of thousand lines needs some organization,
one function of two thousand lines is impenetrable.