[nicoburns]

A lot of those are even older than C++. And of your list, only Objective-C has seen adoption on the scale of Rust, and it both predates C++ and requires a much heavier runtime than C/C++/Rust.

[pjmlp]

CFront was released in 1983.

I bet you can manage yourself to find out when the other ones came into the world of computing.

NeXTSTEP drivers were written in Objective-C, macOS DriverKit is named in homage to the original NeXTSTEP DriverKit.

Metal is written in Objective-C, with C++14 as basis for Metal Shading Language.

As for adoption, moving goalposts, I thought we were talking about system languages being created, not about taking the computer market by storm.