MSVC was laughed at for only providing a stable C++ ABI in 2019. Swift is not immune to the same criticism, and has even fewer excuses for it: we knew for a long time stable ABIs are critical for interop.
Swift is one of the very few languages to even have a stable ABI and is leading in terms of interoperability with other languages. What even are you talking about?
(And interop with Swift is still laughably bad)