I really love fish and used it daily for many years. Then I started work at a new company that had an existing library of internal shell tools that weren't compatible with Fish and the effort to port them was too much.

I found that ZSH managed with OhMyZSH plugins gets me similar functionality without the syntax incompatibilities. Unfortunately unless Fish moves back towards compatibility I don't see myself ever going back, it's just too much hassle dealing with little syntax issues all the time.