I'll admit hostile was perhaps too harsh, however looking back to the late 2010s, it seems clear that the attitude was:

- C ABI is good enough for any compatibility

- "Rewrite it Rust" / RESF

- Prioritize language proposals, not fundamentals

I think the attitude as changed somewhat in the last 2-3 years, with more interest in cxx and crubit and crabi, although many of those things are at least partially blocked on stalled language proposals, and largely ignored by the "core" Rust community. I would say indifference and posturing does approach hostility.

There's also consistent conflation of "compatibility with C++" and "rich compatibility with all of C++". Swift is a great example of how targeting PODs and std::vector and aligning concurrency expectations gets you extremely far, especially if you limit yourself to just LLVM.

btw, I really appreciate your Rust book.