C/C++ : 6.17% Rust : 0.29%
This was addressed in one of the linked sources. What would you accept as evidence, then?
1: https://www.devjobsscanner.com/blog/top-8-most-demanded-lang...
There's no best metric, they're all biased, you need to consider a few different ones. Otherwise you won't notice when you've stumbled upon one with with an extreme view.
Combining C and C++ in language stats is debatable, they should IMHO be measured separately. When grouped as a language category, "C/C++/Rust" is slowly becoming more common.
1: https://tjpalmer.github.io/languish/#y=pulls&names=c%2B%2B%2...
2: https://survey.stackoverflow.co/2022/#most-popular-technolog...
2: Also skews towards a certain demographic
It's very hard to qualify the effect of those biases though: for example how does the public/private repo ratio differ between languages ? Good luck giving a trustworthy answer to that. Apart from looking at lots of different source kinds, one thing that's fairly trustworthy is the trend of a specific language in a specific source.
On that topic, looking at the "SO questions" metric of the first link, C and C++ both have a strange regular spike in the last quarter of each year. I attribute that to new CS students flocking to SO at the beginning of their term. Another fun trend to look at is the hourly google searches over a week: the weekdays / workhours spike is much more pronounced for some languages than others.
One thing I would welcome is specifically looking at new sysdev projects over time and what languages they're in.
To be clear I'm not taking a view on whether Rust will become the standard. I really don't know, and I've yet to see anything convincing me one way or the other.
And there's a ton of those job listings.
Github repos might be a better source of penetration and use.