Print debugging is historical / offline debugging, just ad-hoc instead of systemic.

The ”debug” package on npm is something in between, as it requires inserting debug statements but they are hidden from output unless an envvar like DEBUG=scope.subscope.*,otherscope is used.

I've loved working with rr! Unfortunately the most recent project I've been contributing to breaks it (honestly it might just be Ubuntu, as it works on my arch install, but doesn't work when deployed where I need to test it).