> Honestly, I don't even get the sentiment. Many problems are naturally formulated in terms of recursion. And rewriting them as loops would be considered an opt

> Honestly, I don't even get the sentiment. Many problems are naturally formulated in terms of recursion. And rewriting them as loops would be considered an optimization technique that obfuscates the reasoning. It's not an optimization so much as it is non-pessimization. You have a lot less control over how your runtime's call stack behaves, which means that basic things like error handling, memory usage, observing intermediate state, etc. all become much more inconvenient (if possible at all).