I am pretty happy with what you can do with Javascript/TypeScript. I implemented a hot reload solution for nodejs a few months ago (@hediet/node-reload): It res

I am pretty happy with what you can do with Javascript/TypeScript. I implemented a hot reload solution for nodejs a few months ago (@hediet/node-reload): It restarts stack frames automatically when it detects that its function body has changed during execution. This is particularly useful when debugging, even if the function is not pure. Together with my extension hediet.debug-visualizer for vscode that visualizes data structures while stepping through code, it feels pretty close to an interactive programming environment. I implemented almost all of my TypeScript AST processing tools this way and would feel pretty helpless now without it.