Good Article. The author has touched upon all the points that make C still attractive today.

A few more points;

C allows you program everything from dinky little MCUs all the way to honking big servers and everything in-between. It also allows you to span all levels of programming from bare-metal, system-level (OS/System utilities etc.) to any type of applications.

There has also been a lot of work done and available on Formal Verification of C programs Eg. Frama-C, CBMC etc.

Finally, today all LLM agents are well trained on the massive publicly available C codebases making their output far more reliable.

PS: See also Fluent C: Principles, Practices, and Patterns by Christopher Preschern for further study.