I learned how to make soldered connections when I was a kid helping my older brother. We used fire heated soldering irons for small joints not solder pots.
A few years ago an electrician did a new house and soldered all the joints, with crimps on the grounds. He said the way he did it was to prepare, i.e. twist and flux, all the joints first and then go through with a small torch and do the whole house.
He had good solder flow and no cold connections. So I approved the job. When I asked why he did it he explained that since nobody else did solder work he could tell if someone had messed with his job, changing or adding to it. Kind of like the plumbers when they used copper pipe and soldered everthing.
