The usual. Find out how the concept was successfully implemented before, learn from these implementations' mistakes, and leverage all of that knowledge in your current work.
Probably just bitterness from the general trend of reinventing everything in computer science, all the time. People who are unaware of former work on any given topic are forced to reinvent it, poorly. People who are aware of it are forced to watch everyone else reinvent them.
Without any sarcasm, communication is a hard and unsolved problem in general.
The irony here is that you appear to be unaware of the former work on algebraic effects, to the point that this one lightweight blog post forms your entire understanding of it and you mistake it for a limited and ill-defined language construct...
