As mentioned in the article, Pascal had these even before Ada, and a task type with an entry is effectively a generator. I think people often forget that C was incredibly primitive for its time compared to multiple other languages.

Many are sold on the story of C's greatness design, without bothering with historical fact checking.

C rode the wave of UNIX's success, it is like someone getting into computers in 2024 and praising Javascript's greatness for Web development.

ESPOL in 1961 already had unsafe code blocks, almost a decade before C came to be.