Anecdotal: There are several shops in town that use Progress 4GL. I used to work at one of them. It is a definite niche language language, I had never heard o

Anecdotal: There are several shops in town that use Progress 4GL. I used to work at one of them. It is a definite niche language language, I had never heard of it until I worked there. However, if you are a customer of a (smaller) bank or credit union there's a good chance that you are indirectly using this technology. That said, I'm not sure what this rant is about? Is he mad that scala/groovy are more niche? You wouldn't find (any?) Progress 4GL on github because it's a commercial language. You have to pay for it. But it generates millions of dollars of sales and is in use in hundreds of companies (at some level).