Age of the langs absolutely needs to be taken into account if comparing stability and feature addition rate. According to Wikipedia it's 47 years for C vs 8 ye

Age of the langs absolutely needs to be taken into account if comparing stability and feature addition rate. According to Wikipedia it's 47 years for C vs 8 years for Rust (as of 2019) - it's not that surprising that a 6x older language is much more stable.