After using a proper debugger, I can almost say I'll never go back to a language without one. It's such a useful tool, I use it a lot even when writing code. I

After using a proper debugger, I can almost say I'll never go back to a language without one. It's such a useful tool, I use it a lot even when writing code. I think if you asked a functional programmer to give up their REPL, they might not be so happy. The debugger is essentially the REPL of imperial languages (because a REPL by itself is not enough for imperial languages since all the state has to be set up). Also, it's extremely useful when learning a new codebase as well as actually debugging bugs. I also think it's necessary to have one for a language to gain mainstream support.