I had to rescue a codebase that was all-in on sagas by developers that didn't seem to really understand what they were for. It was one of the most difficult and frustrating projects I've ever worked on. Debugging was a total nightmare because bugs were so decoupled from their causes. I'm sure there are cases where, in the right hands, sagas can help solve complex problems but, like redux, they are overused by people that are just following the herd and can create a ton of accidental complexity.