Resumable code is extremely helpful and I'm pretty sure you're describing a chicken and egg issue: if resumable code was readily available in general, people would use it a lot more and it would look like a very normal tool that is often the best.
But when it's only a feature available in niche languages or many languages make it unsafe or unreliable, then very few people will get to the point where it naturally pops up in their mind as a solution to their problem.
But when it's only a feature available in niche languages or many languages make it unsafe or unreliable, then very few people will get to the point where it naturally pops up in their mind as a solution to their problem.