Context: I write rust professionally I have no plan of coming back to cpp.

Cpp still has the (huge) advantage of maturity. Rust is great but still half-backed. Things like thread-local-storage, custom allocators and async are either unstable or incredibly rough around the edges.

Finally, my experience has been that third-party libraries in cpp are fewer but of greater quality than the ones in rust. There are many many libraries available in rust due to the amazing dependency system. But the average quality is quite poor.

In cpp you tend to be conservative when adding dependencies which means you have a much better understanding of the code you run. Or, you write your own code that’s usually custom made for your purpose, which generally end up as being more performant.