Not many use an actual c/c++ compiler (clang) to generate language native calling convention wrappers for calling into C/ObjC code (not sure how well c++ interop works these days).

Few as elegant, as safe, or as performant combined...

Delphi, D, .NET, Eiffel, Ada, Rust, Nim.

And lets not put Swift and performance on the same sentence, they still need to catch up a bit.

https://github.com/ixy-languages/ixy-languages

What is this, a cabinet of curiosities?

Aside from .NET and Rust, all the others are not players in 2020.

Ah, that might be the reason why NVidia is adopting Ada for their firmware, ebay and Netflix decided to use D for some of their projects, the Turkish government decided to invest into Delphi for their education system,...

By the way, it is a list of languages with compilers that currently outperform Swift.

>Ah, that might be the reason why NVidia is adopting Ada for their firmware, ebay

A, the "some part of some huge player with 2000 divisions uses some otherwise niche language, surely said language is making a comeback" argument.

You can find all kinds of niche/sidestepped languages if you look hard enough on any organization that has 200 products, 1000 inside projects, and tons of engineers. Doesn't mean said languages are making a comeback anytime soon.

For languages that actually thrive nobody needs to enumerate major and minor projects where they're used, because they're too many to mention. But when the main news for "Planet language X" is "big corp decided to use X for something among the 100s things they do", well, they need all the straws they can grasp.

Same way Latin remains a dead language whether some Oxford professor recently published a book of new poems he wrote in it or not...