C is only used because it has a widely deployed set of libraries and by it's nature as an underpinning of most foundational software because it was the language of choice when we really started hitting exponential growth in computing. If there wasn't an enormous set of software and source code out there for it already, would there be any reason to use it over anything else?

And even then it's latest language standard update was in 2018. You still have to deal with the fact it's changing and keep up with it if you plan to read or use others code. And of you don't, then you can safely not care about advances in C, just as you can safely not care about changes in Go.