It's a condition system, not "algebraic effects". Googling for "condition system" shows you exactly how it already works in an existing language with living implementations that are updated daily and released monthly, not in some hypothetical JavaScript dialects the author mentions.
I think you can fault the academics that use the "algebraic effects" term for that. Alternatively, you can see it as an extension of the efforts done in Lisp community since the 1960s.
However, neither the linked paper nor the author of this article seem aware of Lisp's prior art in this space, which is a shame. In particular, it's not true that you "can't touch this" - you absolutely can touch a production-ready implementation of this, in Common Lisp, and could for the past 30 years.
