While that could work for small software systems (or small modules which you can rewrite), it's simply not viable solution for hardware bugs (like the one GP de

While that could work for small software systems (or small modules which you can rewrite), it's simply not viable solution for hardware bugs (like the one GP described) or large software projects which are mostly in the state of perpetual mess and horrible dependency graph. This actually reminds me a type of bug every electronics novice has seen- a circuit does not work unless you touch it with your finger (or even place your finger next to circuit). Some of these bugs you can solve by rewriting the software (enable internal pullup/pulldown resistor) but some others you can't solve without soldering iron (missing GND connection).