[lutusp]

I don't know anything specific about the site, but that might reflect an aesthetic bias overcoming the realization that Java is ubiquitous. It all depends on the degree to which a site's operators care about teaching what's being used in real-world projects.

If I ran such a site, I might want to suppress my own aesthetic preferences, but even I would probably exclude PHP, as one example, only because it doesn't represent an easy way to create reliable, understandable programs.

[LLWM]

It's a conspicious omission for something that's being sold as "The Site That Teaches You to Code Well Enough to Get a Job".

[djur]

I've been on exercism for a while and this is the first time I've ever heard such a claim. The headline seems to be based on this weaker remark in the article: "it could help the legions of people out there trying to learn to code well enough to land a job in this fast-growing field". And even that isn't directly based on any quote from anyone related to the site.

exercism is definitely a volunteer-driven, open-source operation, and the exercises come from people willing to contribute them. I was going through the OCaml exercises and found that one of them had an error[1]; I submitted a pull request and it was accepted within hours.

I think this is a case of a clickbait headline that doesn't do justice to the article nor the subject.

[1] Unlike some similar sites, exercism doesn't actually build and test your submissions. This makes the site much simpler and cheaper to run, but also makes a point that simply passing the included test suite is only the first step. But it also sometimes results in sloppily-written exercises for the more marginal languages.