I have very little soldering experience - nothing harder than resoldering audio wires in headphones or replacing a mechanical switch on a computer mouse circuit board. I used a plain old unregulated 40 watt soldering iron at all times.
Now turns out there're temperature controlled soldering irons - reading that answer was the first time I heard about them. Which makes me suspect that maybe my prior soldering experience might have been better should I have one of those.
How do I know if I need a temperature controlled iron? What are specific scenarios in which a temperature controlled iron will be advantageous?