"Why are programming environments still so primitive?" Try JetBrains tools (IntelliJ,Pycharm and kin). I still use vim to edit from a shell, but the JetBrians

"Why are programming environments still so primitive?" Try JetBrains tools (IntelliJ,Pycharm and kin). I still use vim to edit from a shell, but the JetBrians suite is higher-order coding. Editing a function while debugging it was available in VB in the 90s. Drag the execution arrow to code you have already run, rewrite it, and step-over.