[Eric_WVGG]

This is turning into a silly argument… but anyway there's a blogger who has been tracking the number of binaries written in the various languages (and appkit vs catalyst vs swiftui etc.) for years.

Sonoma is 13% Swift (up from 11% in Ventura), 53% Obj-C (down from 55% in Ventura). The priority actually appears to be eating away from the C/C++ parts of the codebase (currently 33%, down from 42% just two releases ago).

https://blog.timac.org/2023/1128-state-of-appkit-catalyst-sw...

[jshier]

At this point you can't separate Swift from the rest of the system so cleanly. Since it's now included with the OS directly and linked to from many system libraries, including parts of Foundation which have been directly rewritten in Swift while maintaining ABI compatibility with Obj-C callers, virtually everything on the system that uses Apple's frameworks uses Swift to some degree.