What's the point of the
builtin builtin when the
command builtin has the exact same functionality when it comes to looking up builtins?
When making sure that a particular builtin is chosen over a function with the same name,
builtin offers no additional value compared to
command. One could argue that
builtin is more explicit but still, I could only imagine that using
command might be picked when one is not sure if some command is also available as a builtin.