packet lib not in DynC 10.64?

I’m noticing that packet.lib is included in 10.60, but not in 10.64.

Can someone shed some light on why it was removed?

I see nothing regarding removal in the 10.64 release notes.

My suspicion, which would be great to confirm or correct or refute, is perhaps its got some bug that Rabbit does not want to fix. Perhaps the evolution to ANSI makes it incompatible? Or something else?