Not at all. Some other languages work this way, and in the right context (best-effort systems, not mission critical ones), it can be a boon to backward compatib

Not at all. Some other languages work this way, and in the right context (best-effort systems, not mission critical ones), it can be a boon to backward compatibility and other ease of use factors. In Python for example you can explicitly declare variadic functions to ignore extra arguments. But when it's the default behavior you can for example change the official signature of a callback interface without breaking compatibility. It can be pretty liberating to work in a best-effort language...though perhaps it makes testing a bit more important.