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Ryan HolmFront End Web Development Techdegree Student 12,726 Points
JSON and AJAX — the course is being retired, is this because a new language is going to take their place?
I noticed in the links for learning more about JSON and AJAX — the course or both being retired. Do this mean these languages are being replaced by something more popular or are these videos simply being replaced?
Steven Parker228,025 Points
Fetch is certainly becoming a popular way to do AJAX (thought it still doesn't solve CORS security issues transparently like jQuery does). But we can expect the new focus of Treehouse will probably involve a lot of things being retired and not replaced. See both the staff and student responses to this question and this other one which are both related to the recent (and coming) changes.