It's a bit intentionally vague. For instance, let's say there is a language dedicated to hardware prototypes (let's call it Gabview)... Say it is very popular

It's a bit intentionally vague. For instance, let's say there is a language dedicated to hardware prototypes (let's call it Gabview)... Say it is very popular now but it is difficult to use and no one enjoys using it. If the theory holds true, a new language will come around gain popularity with hardware firmware developers and Gabview will fade off into the distance.